Dom, If you want your cam timing to be exactly the same from cylinder to cylinder it needs to be done in a stock block. They are all over the place. I won't put a motor together for performance without bushing the lifter bores be it a flat tappet or roller.

Everyone wants their pistons @ the same deck height, rods the same length and the stroke on the crank equalized not to mention having all the cam lobes the same.

So think about the 16 different angles the lifters are are seeing in relation to the cam.

More power than most would think but JMO and