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Re: Any issues with swapping from 396 to 454 HO in 67-72 Trucks?
Once your 402 is removed and disassembled you'll get a better idea of direction. I discovered that my heads were 396 325 HP car heads that were much better than the stock truck heads. The machine shop made sure my block and heads didn't have any cracks but also discovered my crank was too bad to turn and had to be replaced. Hopefully the truck is not your daily driver and you have some time to think through all possible options.
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