750hp on stock frame? Stock type suspension?

[69restomod]

Aright guys looking for some real life experience here for the guys that run big horsepower with a stock frame and stock type suspension. When I say big horsepower my motor will be done in a few weeks and were expecting a 750 hp at the flywheel on nitrous between 550-600 and motor using a induction solutions crossbar plate with standalone fuel sustem with race fuel to make up the rest to 750hp, that's big power for me lol it's a 385 ,solid roller .690+ lift with cncd afr 210 heads that have also been hand ported, it's in a 69 shortbed c10 has an ece 4/6 drop on it with tubular trailing arms mounted in the stock location to the stock crossmember, front and rear roll bars, truck weighs 3750lbs, Frame has been boxed in a few places with tubular crossmembers, my question to you guys is how much do I need to stiffen up frame trans crossmember trailing arm crossmember etc. truck at end of last season pulled 1.7 60ft times and ran 12.60s @107 with a 400 flywheel horsepower 383 on a 28-10.50 et slick, also has a 700r4 with 3600 edge converter and a built 12 bolt with 4.11s , so if you guys have any advice on suspension setup, tires, etc. that would be great trying to get everything ready for getting the motor back in a few weeks!