if the pistons are forged !!the 150 shot should be ok on 462 just put a micro swicth on the carb that way it will only come on at full trottle.can get from summit or jegs. tune, you run 36 on motor run 31 on nos run the best fuel you can. i'm not sure what you can get for fuel but a mix of 91octane and some race 110 would work 5to1 5 rg 1 race.150 is not all that much for a big block.just do small runs and look at the plugs at first make sure no burnt plugs or very lean white pluges.go slow on the install make sure everthings done right and you will be fine.