I have a set of trickflow heads coming in with an XR270 cam will I have to get a longer pushrod with steel stamper rockers? and if I get roller rockers what size for them?

 

i would call trickflow and see what they say...

 

Nobody can predict that. There are far too many variables; deck height and the head gasket you use are 2 examples that not even the head mfr could tell you what you have. The only way to get it right is to assemble the motor and check it.

http://www.compcams.com/catalog/279.html

 

after reading that i releized how fun this is gonna be

 

I recently installed the same cam in my motor with S/R torquer heads and Scorpion roller rocker arms. Stock length small block chevy pushrods are far too long.

With OEM style replacement hydraulic roller lifters I ended up using Comp Cams High Energy Push Rods part #249-7808-16 (7.195'' 1987-Up with OE Hydraulic Roller ).

I did check the length with a pushrod length checker I borrowed from a local speed shop but it ended up needed stock length. However I did not deck my block or mill my heads. Depending on what work you have had done, the length could be different.

Hang in there man, it will all be worth it when its done.

 

Trick Flow sends a sheet in with their heads that gives reccomendations on what length rods to use with their heads and various types of rockers.
To be safe I would (and did) get a pushrod length checker and see for yourself. I ended up needing rods .100" longer for my setup.

 

I would go to Trick Flow's site, and download their booklet on their heads. I did that, and they have me as needing 7.350 rods. I have them in the garage, but when it comes time to install, you know I'll be checking the length first.
Oh yeah, and I agree with everybody, if you get a used block, you won't know if it's been decked, or anything else.. Better to be safe, then bent..