All LT1's use reverse flow cooling, The Caprice version has cast iron heads instead of aluminum like the Corvettes and Camaros. Are you sure it is a 5.7? There is also a 4.3 version.
Martin
As long as he has the whole thing from oil pan to intake, wiring harness and ECM, it really doesn't matter. The bellhousing and motor mounts are the same, and the radiator doesn't care at all, which way the water flows through the block.
Martin
The Opti-Spark is not that bad. Especially because in 1995 they vented them, and fixed most of the problems they were having with them. An LT1 is better than 75% of Gen I small blocks out there.
Martin