okay the lt4 KM is on its way so know i really want to beef up the valve train some what, i had thought about doing a cam but it appears to be alot of work, so now im pretty much dead set on RR, what i need to know is should i be looking to replace my valve springs at all by anny chance and whose running with what kind and who noticed the biggest difference and other tips or help is greatly appreciated!!!!!!
also any body done the underdrive pulley mod? i read that one guys post on it, my friend did on an 93 LT1 car the guy said he noticed a difference ??? so im just sittin here scratchin my head...


Mods
K&N intake
Borla Exhaust
170* stat
ported and descreended MAFS
TB bypass
BBK shorty headers
SLP fan switch
Air foil
MSD super conductors

Thanks again!

 

I think for the gain that you would get with the underdrive pulley, you would be better off saving your money and putting it elsewhere. As far as the valve springs go, I would change them out to the lt4 springs. For stock cam/RR it is plenty of spring and you can get the pretty cheap. I would especially do this if you have a higher milelage car.

Aaron

 

Yes first off, you need springs, I would recommend Crane 10308-16 springs, they're good to .600 lift & require no machining to get them on.