Kinda my thoughts. The big block has more head bolts for more boost, or how big of a deal is that honestly. I wouldn't think more than 18psi or so. This would be 5 miles of trying to get up to speed. Sustained high speed, high boost, high rpm for the measured mile from 4-5. Would be ideal. Honestly
@TT5.9mag latest build would be perfect for power and displacement.