im using the stock bottom end and porting my stock heads and putting larger valves in. l.6rr, LT4 timing chain, need rods not sure on what size yet. need springs not sure what brand to go with. can stock injectors work with thuis setup?(would i need 30lb injectors?) Help

 

I ran stock injectors but was hitting 100% DC with just the cam, so you WILL need injectors. Do you have headers? This cam prefers long tubes for sure. I used the Combination motorsports single valvesprings that are good to 600 lift with no problems. I'd recommend beehive springs though if you can afford them, probably worth a couple hp. The one thing I can't stress enought tho, is to put in a new oil pump with GM white spring. It's cheap insurance against a spun bearing. If something happens with that, you know the motor was getting ready to go anyways. I didn't even mess with the LT4 timing chain. Comp 1.6 pro mags are the best rockers to use, but definitely not the cheapest.

 

I would definitely upgrade to a stronger timing chain set, such as the LT4. Also, as for the rockers, an NSA rocker with guideplates would be your best bet as would chromemoly pushrods.