[J.C.you]

Originally Posted by BruceWilkie

I'm guesstimating that intake pushrod is off center approx 1.25" .... To straighten that out means move the intake lifter bore centers the same amount... offsetting the lifter cup plays havoc on the roller and Crower told me beyond .150" is not a good idea...they dont like any offset whenever possible. The exhaust is also offset in that pic just not highlighted it isnt as severe. So your definately talking major block changes and a new cam core to run the big port at very high rpm reliably.

Bruce, the port is close to 4.6 csa now with no mods to the lifter bore other than the liners. For a small cube motor such as the 445 I mentioned to achieve the target rpm of 10k before choke we would only need a port with approx. 4 csa. Definitely a smaller/narrower port and less, if any angle needed after moving the lifter bores and camshaft lobes. I believe there is enough meat in the existing IA block to get there.