Basically I want to no if i can change the pulley on my 04 dale jr s/c with 75,000 on it, the car has not been beaten on i bought it with 50k 2 years ago, and most miles are from beach trips on highway which adds up when you take about 30 of them at 200 miles just there and back not including driving around in town. Anyways I'm getting my suspicion done with a 1.25 drop in front and 1 inch back. I then want to do performance was thinking of reprogrammed does that add h/p? Also what size pulley should i do i don't want to blow my motor, i just want quick 25-50 h/p if that? what will it add? the more the better but don't want to ruin my motor!

Thanks!
-DALE JR #2001

 

Without supporting the pulley drop with other modifications, no. You can't swap the pulley.

You'll knock the engine and chip a piston.

Read this thread for modifying your supercharged (L67) engine: https://montecarloforum.com/forum/fw...n-3800s-10942/

 

Exactly what chibi said!!