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Twin, large, turbo intercooled with good EFI injections on methanol alcholol will make a lot more power than your making now IHTHs,as far as the life limits on that combination in truck pulling that is something that really needs to be understood before deciding, IMO

That's an easy 10K upgrade, even without the intercooler, which you don't need with alky. Plus you don't see many turbo pulling trucks, at least we don't around here. Bound to be a reason for that. But, if it is truly an "Unlimited" class that you are thinking about stepping into, whatever you do with the motor you have, my thoughts are that you will be SERIOUSLY out horsepowered.

Monte