The Future, after market Alpontiac block with bigger bore spacing and lifter bores move to accommodate new bullet canted valve head.
This set pictured made 1100 HP ( although not the canted valve version ) $5500.00 compete.
PS: has a better water jacket and more the the 10 bolt head pattern to Solve the head gasket issue.
A while ago I had a long talk with David pretty sure if I under stood our conversation correctly the lifter bores on the IA block can be modified. To accommodate push rod placement.
The things they hide, the way they spin things, the excuses that they make and the things they omit.