Best way to add power to my 98 gmc sierra k1500 with 4.3 vortec

[TonyM]

I 100% agree with you the only problem is if I add that much horsepower I'd most likely have to do a built Trans and a few other minor things just for it to handle that much power.

If you're wanting a 500hp+ drag truck, you're going to need a beefed up tranny anyway. I know what your saying, something different would be cool, but I guess it depends how far down the rabbit hole you want to go.

 

[skylark]

I 100% agree with you the only problem is if I add that much horsepower I'd most likely have to do a built Trans and a few other minor things just for it to handle that much power.

This is why I said supporting mods. Even a stock V6 can kill a 4L60E or NV3500. You're going to need a fuel system, tranny, suspension at a minimum either way.

 

[Schurkey]

Future drag truck? Big block!

Sure.

TH400!

Yup. Easier than a 4L80E--no controller needed.

12 bolt or 9" Ford!

Naw. A 9.5" semi-float is stronger than both of them. The downside is the rather poor selection of gear ratios. Of course, the 9" Ford is a poor-man's quick-change, and has every gear ratio imaginable.

OTOH, bolts right in if you get the right core, and has decent brakes included.