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Powertrain Packages • Chevy 350 • Monster Transmission
Chevy 350 Engine & Transmission Packages
If you want a Chevy 350 engine and automatic transmission that already belong together, this is the easy way to buy it. These powertrain packages pair a complete Chevy 350 with a Monster-built 4L60E so you can stop piecing parts together and move forward with one matched combo.
1
Two power levels
Choose between the 300HP package for a strong street setup or the 390HP package for a harder-hitting build.
2
Matched combo
You are getting an engine and transmission package built to work together instead of mixing parts and hoping they play nice.
3
Built for real use
These are great for street rods, muscle cars, trucks, cruisers, and classic projects that need dependable power and overdrive drivability.
One package.
Less guesswork.
Buying the engine and transmission together saves time, keeps the build moving, and gives you one clear starting point for your project. Pick the package that fits how you want the vehicle to run.
Choose Your Chevy 350 Package
Both packages pair a Chevy 350 with a Monster-built 4L60E. The difference comes down to how much power you want and how aggressive you want the engine side of the combo to be.
300HP
Street Friendly
Pump Gas Ready
$7,999.00
Chevy 350 Engine & 4L60E Transmission Powertrain Package 300HP
The 300HP package is the better fit if you want a strong, dependable Chevy 350 powertrain for cruising, street use, and everyday fun without getting too wild.
Engine Features
- Vortec cast iron heads with 64cc chambers, 165cc runners, and 1.94"/1.5" valves
- Hydraulic roller camshaft with .414"/.428" lift and 111 LSA
- HP dual plane intake built for street and strip horsepower
- Hypereutectic pistons with 9.4:1 compression
- Quick Fuel Brawler 670 CFM carb for crisp throttle response
Transmission Features
- Monster-built 4L60E for smooth, precise shifting
- Reinforced internals to handle torque and horsepower
- Overdrive gear for better highway manners
- Heavy-duty lockup torque converter for reliable power transfer
- Advanced electronic controls for shift timing and drivability
390HP
More Aggressive
Street / Strip Ready
$11,999.00
Chevy 350 Engine & 4L60E Transmission Powertrain Package 390HP
The 390HP package is for the buyer who wants a bigger step up in power, stronger top-end parts, and a more serious street and strip feel.
Engine Features
- USA-made cast iron block with 4-bolt mains and 1-piece rear seal
- Aluminum performance heads with 64cc chambers, 2.02"/1.60" valves, and 195cc runners
- Roller camshaft with .495/.502 lift and 220/224 duration
- Hypereutectic pistons with 9.2:1 compression
- Cast iron crankshaft with forged 5.700" connecting rods
Transmission Features
- Monster-built 4L60E for smooth, precise shifting
- Reinforced internals to handle torque and horsepower
- Overdrive gear for better highway manners
- Heavy-duty lockup torque converter for reliable power transfer
- Advanced electronic controls for shift timing and drivability
- Stand-alone transmission controller not included
What’s the difference between the 300HP and 390HP packages?
The short version is simple: the 300HP combo is the easier-going street package, while the 390HP combo steps things up with a stronger block, aluminum heads, bigger cam, and more serious performance parts.
| What You’re Comparing | 300HP Package | 390HP Package |
|---|---|---|
| Power level | 300 horsepower | 390 horsepower / 410 lb-ft |
| Best fit | Street rods, cruisers, daily fun, simpler builds | Hotter street builds, more aggressive classic builds, street / strip use |
| Heads | Vortec cast iron heads | Aluminum performance heads |
| Cam | Milder hydraulic roller cam | More aggressive roller cam |
| Bottom end highlights | Hypereutectic pistons, pump-gas friendly 9.4:1 compression | New cast iron block, 4-bolt mains, forged rods, cast iron crank, 9.2:1 compression |
| Transmission | Monster-built 4L60E with overdrive and lockup converter | Monster-built 4L60E with overdrive and lockup converter |
| Controller note | Check your application before ordering | Stand-alone transmission controller not included |
Why buy the engine and transmission together from Monster?
Because a powertrain package solves problems before they start. Instead of sourcing an engine here, a transmission there, and then trying to make the combo feel right, you get a cleaner starting point from one place.
One purchase, one direction
You are not chasing separate parts, separate orders, and separate fitment questions. It is a simpler way to move your build forward.
Matched for drivability
A Chevy 350 and a Monster-built 4L60E make sense together for buyers who want old-school V8 feel with overdrive drivability.
Better for project planning
When the engine and transmission are already chosen together, it is easier to plan the rest of the build around one clear combo.
Chevy 350 Powertrain Package FAQs
Here are the questions most people ask when they are trying to choose between the Chevy 350 engine and 4L60E package options.
What is included in these Chevy 350 powertrain packages?
Each package pairs a complete Chevy 350 engine with a Monster-built 4L60E automatic transmission, giving you a matched engine and transmission combo instead of having to piece the setup together yourself.
What is the main difference between the 300HP and 390HP packages?
The 300HP package is the milder street combo. The 390HP package steps up with a stronger block, aluminum heads, a bigger cam, and more serious engine hardware for buyers who want more punch.
Which package is better for a street-driven truck or cruiser?
For a lot of street-driven builds, the 300HP package is the easier fit. It gives you strong small-block Chevy power without pushing the combo as hard as the 390HP version.
Which package is better if I want a more aggressive build?
The 390HP package is the stronger choice if you want more power, more attitude, and a more serious street and strip feel.
Why buy both the engine and transmission together?
Because it saves time and cuts down on guesswork. You are starting with a combo that already makes sense together instead of trying to match parts after the fact.
Why is the 4L60E a good match for a Chevy 350?
The 4L60E gives you automatic shifting, overdrive for highway driving, and a lockup converter for better drivability. It is a solid fit for many street-driven Chevy 350 builds.
Do both packages use the same transmission?
Yes. Both of these Chevy 350 packages use a Monster-built 4L60E with reinforced internals, overdrive, a heavy-duty lockup torque converter, and electronic shift control.
Is the transmission built by Monster?
Yes. The live product pages list a Monster-built 4L60E transmission as part of both package options.
What makes the 300HP engine package a good value?
It gives you a complete Chevy 350 and 4L60E combo with street-friendly components like Vortec cast iron heads, a hydraulic roller cam, dual plane intake, and pump-gas-friendly compression.
What makes the 390HP engine package more expensive?
The 390HP package uses upgraded engine hardware including a new USA-made cast iron block, aluminum performance heads, a hotter roller cam, and stronger bottom-end parts.
Are these packages pump-gas friendly?
Yes. The live feature lists for both engine packages call out pump-gas-ready or pump-gas-friendly compression ratios.
Do these packages work for older Chevy cars and trucks?
They can be a great fit for older Chevy cars, classic trucks, street rods, and project builds, but you still want to confirm your exact application and supporting parts before ordering.
Is this a good option for a street rod or restomod?
Yes. A complete Chevy 350 with an overdrive automatic is a strong starting point for many street rod and restomod builds where you want classic V8 feel with better cruising manners.
What is the benefit of overdrive in the 4L60E?
Overdrive helps keep engine rpm lower at highway speed, which usually makes the vehicle more comfortable to drive on longer trips.
Do I need a stand-alone transmission controller?
The 390HP product page specifically notes that a stand-alone transmission controller is not included. If your build needs one, plan for that before ordering.
Are these good for daily driving?
They can be, especially the 300HP package. The 390HP version can still be street-driven, but it is aimed more at buyers who want a stronger performance edge.
Can I add fluid and a transmission cooler?
Yes. The live product pages show ATF and a transmission cooler as recommended add-ons.
What if I want more power than the 300HP package but I am not sure I need the 390HP combo?
That usually comes down to how you want the vehicle to feel. If you want a more relaxed street setup, stay with the 300HP package. If you want a noticeable step up in power and a more aggressive build, the 390HP package makes more sense.
How do I decide between 2WD and 4WD?
Match the package option to the drivetrain setup your build requires. Both live product pages currently list 2WD and 4WD product options.
Why is a complete powertrain package easier than buying parts separately?
Because you are starting with one matched combo instead of building your own package one piece at a time. That usually means fewer decisions, fewer missed details, and a clearer plan for the rest of the build.
