Quote:
Originally Posted by imposter
what about this one im not sure about the compression with 7M5 Heads on a 455
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It'll be a small cam in a 455, especially with the 8-10 degrees you loose with a solid cam's lash, so more like 204-206 degrees actual at .050 lift. You'll need good valve springs with the .500" lift which will help add some power back. The 110 lsa is pretty tight for a 455 as well. If you want a solid cam, get something bigger (230/236) to offset the loss of duration from the lash clearance and 112-114 lsa. I would swap to 6X-8 heads (easy to find and cheap) to rebuild. That'll get you a solid 9.0 to 1 compression...or more with minor resurfacing to true the surfaces.
Dennis