1994 Gen V block. Problem with bare blocks is they are from production cars and hence it means I have to fit 1995 onwards USA pollution equipment. This was a crate motor and hence not appicable. All big blocks have to be at least align honed anyway, so cost will be the same.

I was going to run alloy heads, but just 5 minutes ago I just won a pair of 1974 LS7 990 cast iron heads on Ebay for $305. These are the same open size chambers and valves as the original Winters foundry heads on 1969 L88 and ZL-1, but have bigger intake runners (325cc over 290cc). Will give 11.8:1 with the L88 pistons.

Combination is:

Gen V block, TRW 2308 pistons (replica L88), new scat rods with ARP 7/16" bolts, forged 427 crank, 11" billet flywheel, all balanced.
990 cast heads, cleaned to match intake.
COPO 427, L88 Winters intake manifold with original reproduction L88 850cfm double pumper Holley.
Cam I have isn't quite as big as the L88/ZL-1. It is still a solid lifter cam, the L71/L72 cam from the 425hp iron headed 1968 427. Just slightly less aggressive.
I have to get some special Victor Reinz gaskets to allow the MarkIV heads to fit the GenV block.

This engine should make close to original L88 hp, possibly around 450-525hp at the flywheel. Will be too much anyway for a manual HK GTS327 with 3.5 gears and 14x6 rims with skinny tyres. I have even got hold of aftemarket 427 badges that fit exactly where the 327 badges go!