Hello,
Currently have longtube headers going into MAC PRO dumps right before the rear axle... Thinking about going to short header so that i can add x pipes. Will i take away some horse power by doing this....??


1987 droptop
bbk 70 mm throttle body
SR intake
GT 40 heads
3 row alumium radiator
MSD

 

you can keep your long tubes and get an x pipe that is designed to work with longs.

http://www.americanmuscle.com/bbk-of...ntV1&year=1988

 

And yes, you'll lose a couple ponys, it's debatable on how many, but LT's do make more power. Maybe 5-10 hp difference between the two.