[79fj40moneypit]

The 6.2 has 21.5 compression if you want to turbo it drop it to 18.1 compression, On 6.5 the 'safe' boost is 5 to 7. These 6.2 engines had turbo kits sold by banks for a few years with dramatic engine failures. The main bearing web is the weak link. and the crank is cast not forged. SCAT sells a forged crank now for the 6.5. There is a new high nickel content block, redesigned main web and water jacket 6.5 now that will make 300hp with 18-25 lbs boost. Just be careful with a old 6.2 and a turbo.