so i got my cam and valve springs and pushrods and headers all put on a few weeks ago my dyno tune apt is next friday im ready. but i was impressed with how the truck runs on the stock tune besides it shifts gay lol so is it gonna be a night and day diff? would a underdrive pulley be worth my time?

 

From what i've seen an UD pulley gives you about 7 rwhp.

 

anyone?

 

post #2 pretty much answers your question on the UD pulley.

And yes, night and day difference on the tune.