I personally wouldn't worry about final number on compression. For what your doing, I'd simply cut the heads .040, and not worry about the intake.
Flow over compression any day
I may just do that for easiness sake but if the heads are already in the shop would a few more cuts make a big difference to the cost? It seems like a cheap way to get a few extra HP with no extra work for me.
I'll be installing over the winter and driving all next season with the 318 so would be nice to squeese a few more ponies outta the old girl, but if you dont think its worth the hassle then maybe I'll just take the .040" off and enjoy as is. :)
