Cam swap without pulling motor
Here's a few flow tests that show how an old turd can be polished. The butt dyno should feel the difference.
These heads are 1.88 valve smog heads and do not peak very high. A 1.88 valve 587 head (or a 1.88 J head) from the early seventies would be very similar down low but peak at 195 cfm at 0.500 lift. I think the guide boss is larger in the smog heads.
Here's a few flow tests that show how an old turd can be polished. The butt dyno should feel the difference.
These heads are 1.88 valve smog heads and do not peak very high. A 1.88 valve 587 head (or a 1.88 J head) from the early seventies would be very similar down low but peak at 195 cfm at 0.500 lift. I think the guide boss is larger in the smog heads.