350 heads.
#1
350 heads.
Okay, I've had this newly (older now) machined 350 shortblock in one of those nasa bags for about 4 years now. Still looks like day one. Eastwood and others have these. Anyways, it has flat top pistons 60 over and the cam is unknown. I'll probably change it if I can't find what it is.
What I am looking for for a winter tinkering project is a set of heads for this. I have no idea with the flat tops on the small block Olds what compression ratio I would be running with the different heads. 5-6-7? Just looking for a solid street engine. I also have a set of G 71 big block heads but I think the change over would not work. What I am looking for is around 9.5 - 10.0 compression.
Anyone have a set of heads laying around that will work with this? I just need a starting point. Thanks for any advice.
What I am looking for for a winter tinkering project is a set of heads for this. I have no idea with the flat tops on the small block Olds what compression ratio I would be running with the different heads. 5-6-7? Just looking for a solid street engine. I also have a set of G 71 big block heads but I think the change over would not work. What I am looking for is around 9.5 - 10.0 compression.
Anyone have a set of heads laying around that will work with this? I just need a starting point. Thanks for any advice.
#2
#8 head
#8 heads from a later smog motor should get you about 9.4:1 compression with a 0.040 head gasket and flat top pistons. You be just under 9.6:1 if you milled a little off the heads or used a thinner gasket. #8 heads get a bad rap because of the large (79-80cc) combustion chambers, but they really flow pretty well, from what I've been told.
#3
#8 heads from a later smog motor should get you about 9.4:1 compression with a 0.040 head gasket and flat top pistons. You be just under 9.6:1 if you milled a little off the heads or used a thinner gasket. #8 heads get a bad rap because of the large (79-80cc) combustion chambers, but they really flow pretty well, from what I've been told.
You CAN use the 455 heads on that motor, however you will NEED to use a Performer RPM intake because the ports are larger and there won't be a mismatch. You can also use a cast 403 intake as those ports are larger as well. Just take a little time and a bit of gasket matching. Not really recommended unless you are going full on racing. (I know of a 403 with E heads running 11 second runs...) Just not really worth the trouble either IMHO.
John
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