using UEM(KB) pistons calc 58cc, 20cc, 0.060", 4.1x0.041", 4.030x4" 9.41:1 or 9.68:1 with 4.1x0.027" MLS Cometic C5871-027
standard rockers can handle upto .550", manifolds reversed (LH to RH/RH to LH) for turbo header,
https://uempistons.com/p-27-compression-ratio-calculator.html
https://www.ebay.com.au/itm/Cometic-Gasket-C5871-027-027-Mls-Head-Gasket-Ford-351-Cleveland-4-100-Bore/233431488377?hash=item365999d779:g:Io8AAOSwGshd8cmA