would i have any gains goin from a truck manifold to a victor junior style with an elbow and still use the stock throttle body? or would i have to use the ls2 throttle body?

 

You really need to be pushing the HP north of 500 to get a definate advantage, but your torque will suffer pretty bad. Plus MPG will suffer pretty good.

Nothing deep gears culdn't cure and the lack of torque could even help you got off the line faster.

 

I'd only recommend it if you're running alot of boost(turbo) and looking for more than 500 hp.

Unless you just like the looks of it. Bottom end will suffer on N/A.