how much hp and torque will roller rockers 1.6 ratio, crane powermax cam 423. lift exhaust/intake, and cloyes double roller timing chain give me? If i get these parts what else will i have to get for my valvetrain for this to operate perfectly and last long, and get maximum performance out of this?

 

do a and youll find what parts give you what kind of hp. torque.

 

not neccessarily, the search feature is a PITA to use here. I think you'll have to much lift for stock spring with that setup, but i'd have to check. Might give you10 hp, might give you 20....dunno.

 

yea it can be annoying at times, but there is so much thats asked on here that can easily be found by searching. there is the sticky at the top asking all new comers to search for things they want first. im not trying to be a pen15 or anything.

 

With roller rockers claim they give you 15ftlb of torque through out the entire rpm range.
Are you sure that you get .423'' of lift with those 1.6 ratio rockers?
What is the max rpm you want to run your engine?
If that cam makes .423 lift with the stock rockers it will make about .440'' lift with those 1.6 rockers.
That is realy pushing the springs to there max.
For it to last a long time you will want to think about different valve springs.
Forged valve locks are all ways a good idea.
If your brave enough, upgrade you valve spring retainers to some thing other that stock stamped crap they use.
Springs, forged valve locks and retainres will run you about $120-$130 from summit.
Also check out my cardomain site for some ideas, because I built and I machined my 3.4 heads to take .480''+ valve lift I used summit parts and titanium LS1 retainers from ebay on my heads. And I have 1.5 and 1.6 crane roller rockers. I put part numbers for the roller rockers and I'm going to go back through and put part #'s for all my valve train parts on there here in the next day or 2, because I get people asking me part #'s some times.

 

Replace the springs when you replace the cam. Period.