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Can I use 460 headers on a 370? I see a bunch of header options which specify 385 series 429/460 but none mention 370. Also same question different end, will a 385 429/460 intake manifold fit? Looking to upgrade the 2v to a 4v. This motor is in a f700 and will be used in farm truck bump and run races.
Thank you!!
This basically a demo derby with a few more rules?
I doubt headers will fit due to interference from the steering gear and other items.
They will probably bolt up to the heads.
If you want more beans, a truck 429 is the easiest upgrade. Going to a 460 is possible but will require swapping some parts and probably bringing an automatic along with the engine.
If you have a Holley 2300 series 2bbl, you can check the choke mounting air horn for numbers and find out what model. It's probably a 350 CFM carb. You could change that to a 500 for more ooomph.
370s and 429s in trucks came with 4bbl carbs so you can get one that's already set up for truck use if need be. (Mounting, throttle linkage, thermostat setup etc may be different for car or pickup)
Its more of a roundy round with bumping. They will black flag if you get to ambitious. Sorry to beat the horse here but with the intake, if an edelbrock performer was built for a 385 429/460 would it bolt up to a 370? The 2 barrel is all gunked up so I either need a new 2b or make the swap..... lots of corrosion in the thing I think it sat for a minute. I think a pair of shorty headers will fit, there's actually a fair amount of room. Also it has a 3 speed allison auto which surprisingly is pretty snappy around the track. I'm just sick of putting the pedal down and having it fall on its face. Once it gets over the backfiring it actually has great pull. Thanks for your reply
Last edited by Renegade212; May 26, 2025 at 07:20 PM.
I would sure put a 4bbl on it
but
If you fatten up the mixture a bit on the 2bbl, it should run pretty good, and without lean misfire or backfire
I'd raise the float level to the highest setting for starters and check the jet size, replace the power valve and check the accelerator pump
With the governor assembly bolted onto your carburetor, I doubt it will ever rev high enough to see any benefits of headers. Your stock manifold’s probably already have 2-1/2” outlets.
I had a 88’ F600 and I bolted on a regular 500 cfm Holley, a Summit CDI ignition and removed everything emission related. There was a noticeable increase in power and the CDI box has an adjustable rev limiter so you won’t break the crank.
Since it’s just a big heavy race truck, you need cubic inches. I would think 460/C6 would be a better combination.
A 4412 carburetor would probably be a pretty good upgrade to the engine. They are 1/2 of a 4779 750 4 barrel and it would be easy to bolt on. On a 370 inch engine it will probably be large enough to give you about a 5500rpm power peak before becoming very much of a restriction.
I also agree that a 460 would be a big improvement too but If you're out to get it running well in a hurry without spending a lot swapping out the carburetor would probably be the easiest thing.
With the governor assembly bolted onto your carburetor, I doubt it will ever rev high enough to see any benefits of headers. Your stock manifold’s probably already have 2-1/2” outlets.
I had a 88’ F600 and I bolted on a regular 500 cfm Holley, a Summit CDI ignition and removed everything emission related. There was a noticeable increase in power and the CDI box has an adjustable rev limiter so you won’t break the crank.
Since it’s just a big heavy race truck, you need cubic inches. I would think 460/C6 would be a better combination.
I've heard from others, opening up the rev limiter is huge on these motors as long as you don't go past low 5s. Did your truck have a 370? Of so do you know what ignition you used? Everything says 385 series 429/460 and I hate to assume. It's a fairly light single axle truck with a light short box so the power is fine, just need some better response and higher rs.
Those engines have a different rod and piston and probably a steel crank vs. the car 429 and car/pickup 460. The pistons have a different compression height, and may be 4 ring. They are larger and heavier than the lighter vehicle piston.
Hence the governed engine speed. You might get away keeping it under 5000 rpm. Or you might not.
Those engines have a different rod and piston and probably a steel crank vs. the car 429 and car/pickup 460. The pistons have a different compression height, and may be 4 ring. They are larger and heavier than the lighter vehicle piston.
Hence the governed engine speed. You might get away keeping it under 5000 rpm. Or you might not.
It would be a shame if I took the crank out and it forced me to put a 429 in it 😎. I do have an adapter plate to hook my chevy 454 to the allison 545 too. Might be easier than swapping to a 460 even.
I've heard from others, opening up the rev limiter is huge on these motors as long as you don't go past low 5s. Did your truck have a 370? Of so do you know what ignition you used? Everything says 385 series 429/460 and I hate to assume. It's a fairly light single axle truck with a light short box so the power is fine, just need some better response and higher rs.
I did have the 370. Here’s the ignition box I used:
