Originally Posted by mgood613

I have Howards ASA cam with PRC stage 1 heads milled .030 with .045 cometic head gaskets. Texas motor speed said I could go with .035.

When I measured I was .083 Exhaust and .121 Intake PTV.

I know the 241 and 243 are different, just thought I would give my two cents with the cam.

I would still check, every engine is a little different.

1999 LS1