Ok I know there are a ton of posts like this, but all seem to go off topic. I'm sure this will like all others but worth a shot. I have a 1970 Dodge Dart with its original bone stock 318 with a 4 barrel. Heads finally need redone. Question is will 340/360 heads or an aftermarket head drop the compression ratio too much? Once again I know this has already been asked but it seems it's with all the super low compression 318's from the mid 70's. I'm not in that boat. And no no engine swap or pistons or anything. This is the original engine to the car and the bottom end is great! Might do a mild cam too.
