Originally Posted by Hopper (Post 3830887)

Dont forget after 20k on the 800 hp engine u are going to need a different drive!!!

Originally Posted by rmbuilder (Post 3831182)

Airbats,
If your block is, in fact, a Gen V Bowtie (9.800”/10.2”) block, you’re in great shape for the proposed modifications.
Gen V Bowtie blocks were a siamesed cylinder case with elliptical bores. They were delivered with a raw bore size of 4.250” and a minimum wall thickness of .500”. A bore size of 4.500” (in your case .250” over) was conservative, and the block was designed to provide a .325” wall thickness on the major and minor thrust faces @ 4.600” bore dimension. The recommended max stroke was 4.600”.
Regarding HP rating for the blocks, the nodular cap block was conservatively rated to 800 HP and the 8620 cap block was rated to 1200 HP. Again, this information is predicated upon you having a Gen V Bow Tie block. If you need the casting numbers validated, let me know.

Bob