Just to give you guys a full background on my current set up. I have a sbc 383 backed by a turbo 350 and stock rear end. Last year I scored a complete 5.3 with wiring harness an ecu. Today I decided to drop the block off to the machine shop to start a single turbo set up by next spring. If anyone has any suggestions as far as what bottom end I should go with, any input is welcome. I wouldn’t mind going e85. Just don’t want to have to use race fuel. But would like to get as much power naturally aspirated before turbo.