I have a friend that has been running a hemi with a procharger for 4-5 years. I think he has been around 6.50s at best lately. He has broke a LOT of parts along the way, cranks, blocks, rods... you name it. He has used only new and top notch parts.
You try and go that route with a Pontiac and I think you will break most everything you can break. And you will have a hard time getting into the sixes at all.
Staging a turbo car (with a auto) is not a big problem these days. Getting the right converter is the big problem and that will take some time to solve.
Consistent ets will come when your combo i sorted out just like any combo.
If consistency is important I would go EFI and turbo and alcohol for fuel.
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 Street/strip 1969 TA clone. Back halfed. 3300lbs. Twin turbo LSX 387cu. JW glide. Holley Dominator EFI. E85. Street driven.
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