this is in a pulling truck so a normal pass is about 20 secounds of full rpm. would you go with Ti valves? Will the T&D single shaft rockers hold? cam is .715 roller using .120 wall p-tubes and planning to run comp 947 springs(comps recomended). thanks for any input

What heads

Like P body asked.... what heads?
Reason is Ferrea makes hollow stem valves that are 20% lighter than stainless and a lot cheaper than titanium. I would only go with Jesel, T&D or Harland Sharp rockers. all can handle the stress. Might think you need to go to 948 springs for more control.

Sorry about that they are indy -1 cast iron for rules 2.25 int valve

You dont have much choice... Like Mr-P said T&D or Jesel. Might as well cross T&D's you speak of off that list. The wont work with those springs which are 1.645-1.65 or so....
You cant even run 1.625 springs with those rockers without clearancing the rocker arms.
I ran this very setup. and turned it 8K a few times.
Jesel 1.7 rockers
Manton PushRods .120 wall
Pac springs and Titanium retainers. I ran this setup for 3+ seasons, never had the first single issue.
Spray bat valve covers I made my self.
Use ball end/ball end pushrods, have the cup on the adjuster side.

At that RPM you really need Titanium valves--no question--you also need the best springs you can find--I would call PSI or the guys at CV Products-at that RPM it is time for Del West or similar quality Titanium retainers not the plain ole Comp junk--I would go Jesel all the way--Manton pushrods--spring location and control is a must and to be very honest you are past the threshold where a belt drive timing set will REALLY payoff--it reduces harmonics that destroy normal valvetrains and at that constant kind of RPM I would make sure I had the belt drive first even if you did nothing else. Get the Jesel NOT the cheapie Aussie copy! Time for a REAL damper as well--ATI is tops if you check hub/crank fit before you install-- I have done two winning pulling engines that are like you are running--had several trys at both builds and learned plenty--it ain't drag racing for sure! And remember--HP is not how pulling is won--it is all that science about wheel speed / drawbar etc Good Luck!

thanks for the input thats the way i was leaning. Just wanted some opinion before i dropped the cash for all the jesel setup. What is a ball park cost on having the heads machined for jesel rockers