Will a set of 915 heads from a 340 fit on a 318? If so, which cam would be the best one to use for street performance? The 318 is a 4-barrel auto. Thanks

yes they will

i run a lunati 60710 VooDoo roller cam in my 360 headed 318 in my daily driver truck

258/264
207/213
.485/.485

the whiplash from hughes is a nice one with a lumpy lump lump idle to it also

any of the lunati sb cams can use the comp 901-16 springs...drop on with stock seals

FYI...lunati springs are doubles and need pc seals and machine work to go on a stock sb head

it'll kill compression, hurting low end torque. compression will be in the 7's, unless you mill a fair amount.

the comp 901 springs will work with any cam up to about .495 lift.

cam, with the low compression, biggest I'd go would be a comp XE256 or lunati voodoo 60401 unless you are doing a piston upgrade or heavy milling.

a better head choice for a stock short block 318 are magnums. they outflow the 915's with smaller ports (better velocity=better midrange throttle response and torque), and have ~9cc smaller chambers than the 915's, (63cc vs 72) so you'll actually get a slight compression boost over even stock open chambered 318 heads (~68cc)...you just need to run hollow pushrods that are ~7.625" long and stock magnum rockers, and either redrill the heads for LA intakes or run a magnum intake.

hughes sells their "Iron Rams" (enginequest 318A/B magnum replacement heads) complete with their #1110 springs for $725...I'd probably run a voodoo 60402, comp XE256 or XE262, or engle 4418.

he said 318 4-v

that will allready be low on comp with 360 heads

so i would not think it will drop any more than it allready is with 915s

What about using the hi-swirl LA heads from '87-'93? The 360 heads would have larger valves than the 318 heads. I had a set of 318 heads installed with 2.02/1.80 valves and it's running great. A poor mans version of the Edelbrock heads.

I like the #302 cast swirl port heads with 1.88/1.60 valves with a home pocket port also

I like them on a stock 360 bottom end also for a truck/work engine...lot more torque



with patrick,spend the $ on pistons unless the heads are shot completly

my 360 headed 318 works nice in the 85 truck with the lunati roller cam for a driver,I followed patricks advice on that one and it works great for mine with the low CR

Magnum heads from hughes are a nice deal hp per dollar.

This is what my 323" heads are. 596? series 1969 318 heads sent from Aerohead $399 pair. Resized with 1.88/1.60" valves. Intake pocket hump was ground down , and some minor clean up, that was the extent of the porting. 76 cc chambered head was milled .060" to about 64cc. That puts me somewhere around 8.8:1 real compression. Awesome for 87 octane cruising power and mileage mix.

The 323 is armed witha 340 hp factory cam .430/.444", on the stock adjustable roller shaft valvetrain.

Exhales with summit headers, the Edelbrock streetmaster 318 intake is a unusual charateristic single plane with operating band best 1000-4800rpm, and a Holley 600 vac sec.