Originally Posted by 451Mopar
Quote
I'm considering the XR 286 HR-10 Comp, their website states billet steel. I'm aware of the lash and having to experiment with it.


Running that cam in my 505" rb (0.030" over 440 with 4.25" stroke)
Running with Stealth heads, 10.3:1 compression, and 1.6:1 HS Rockers.
It is a fairly tame cam (running EFI), makes good torque, but I limit peak RPM to 6,000 RPM.
Using ISKY 8005A valve springs that are just a bit stiffer than the Comp 925-16 valve springs. Retainers (for the Isky springs) are Comp 748-16

Video was when it had a RPM Intake and 750 cfm carb, TTI 1-7/8" headers, and 2.5" TTI X-pipe exhaust with the TTI supplied Super Turbo Mufflers.
https://www.youtube.com/watch?v=0ui4GCHn_7o



I forgot to mention, the Lifters were from Hughes Engines, I think the HRC 91774, which were less expensive than the comp lifters.
I did not open up the pushrod holes on the heads, so I used custom 5/16" Smith Brothers pushrods, I think they are the 0.083" wall or thicker?