Mechanic thinks the badly skimmed heads that were causing waster to ingress and come out of the spark plug holes caused all my overheating problems.
Ive been told that I could swap my camel hump heads out and put AFR 180 aluminium heads in their place as a straight swap and continue using the same manifold and carb set up.
(Thats if I can find some secondhand, anyone got any going?)
Is that right? I thought that aluminium heads would need a different manifold? (Same guy said it is only Vortecs that would need a different manifold...)
You cannot just keep re-facing heads, you have to have a starting point and it is no good if the heads are out of "parameter".
Overskim is bad for valve train geometry, and crack prone, pics would be better.
I've just had a block decked on a 326 Pontiac for the same reason, a real bad factory finish.
you can fit any of the SBC heads to your block, they don't need to be any particular ones, the camel hump heads you have should be 64cc heads but all it means if you go to different heads is you might end up with lower compression. the vortec heads are slightly different and yes they would need a different inlet manifold, the centre bolts for the inlet are different on the vortec heads, the bolts go in vertically as opposed to a normal inlet. if your heads are skimmed slightly too much you can get thicker head gaskets and inlet gaskets which can help line them back up again.
Camel hump heads are small chamber as said, so using the later open chamber style head will drop the compression ratio quite a lot.
One other thing that might be an issue is that all the Camel hump heads I've seen have straight plugs i.e. they stick straight out the side of the head at 90 degrees. Some of the later heads (and a fair few of the aftermarket heads) have the plugs sticking out at an angle, this can cause problems with some exhaust manifolds in that the plug points straight at the runner.
Last edited by stueeee; 02-07-2017 at 15:29. Reason: double post
Given that you skim heads quite a bit by the look of things, what do you think of the images? (obviously I won't hold you to anything...)
Do you have any heads that were never picked up that you have already working on?
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