If you use the stock plenum then 70mm is plenty. If you get the C&L Plenum then its been proen that 75mm is the best.

P.S. Have you ever driven a car with 4.10's? They are in my daily driver and in no way are they "Too much". Ive even considered 4.30's.

 

a 75mm on a non-pi car is way to much, hell a 70mm might even be too much. stick with the 70mm in ALL cases unless your supercharged or get a C&L plenum (all other aftermarket plenums and stock you should use a 70mm), trust us - bigger is not better in this case

 

well the PIs r in my future but 70mm is fine for now and my old car had 3.73s and i thought they were just fine but i might think about the 4.10s

 

Good call on the PI's! The sooner the better!

 

tell me about it but im still in school right now i can't wair for the summer

 

I know what you mean, all I do is work, work, work. Kinda hard to find time to work on the ride. But ya know, always gotta make time for the ride. Good luck with yours though....got any questions just ask.

 

don't worry i will and i plan on beating my old 1/4 e/t as soon as my drag strip opens next friday this week is spring break(well monday starts it)

 

Well good luck man and hope you beat that ET.

 

i hope so unless it rains then o well i hate the rain

 

Why go 75mm for 'future plans' when you think 4.10's is too much for a DD...

Go with a 70mm, you'll like it.