318 heads on a 360

texas360 said

so how bad will 318 heads kill a 360? the motor i have has a fresh rebuild on it,but the heads are 318 heads... cast number..4027163 i believe them to be later model smog heads as well.... im at a stand still until i find some 360 heads.. i'm running the comp xe274 h cam, long tubes, Weiand Stealth intake with eddy 4 barrel...

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I've run 12.6 @ 107 mph with a 360 with 318 heads and a modded 600 edelbrock carb. Granted mine are ported but the port volume is still pretty small and with a 222/234 @ 0.050 cam on a 112 lsa it seems to start making power @ 2500 rpm and mid range is great. I run a 904 with a 8 3/4 with 3.73 gears and 255 M/Ts. Strangely enough the car ran much harder when the heads had less port work and a smaller 1.84 valve and 256 @ 0.050 solid than it does now with a 11/32 1.90 and Crower 271 HDP. Chamber size is 62 cc and a performer 318 manifold.

If it were me give your heads a bowl job and mill them to 60cc to get the comp up and see how it runs.

With ported 360 heads with a 11/32 1.96 valve 60cc chamber and a 243/245 112 solid cam it ran 12.66 @ 106.7 with a weiand stealth and 800 AVS carb

Give it a go you may just be surprised by how it performs.