Attached are a few pics of my GT40 heads off a 93 302 cobra installed on my 289 w/ Scorpion roller rockers. My stock rods are too short. I just got an adjustable push rod and I'm gonna mess with it till I get a good wear pattern on the valve tips. Any suggestions on what length I should start with or you used? Also what budget friendly push rod brand do you suggest? Installation instructions for Scorpion Non-Adjustable Rocker Arms: Working on one cylinder at a time, watch the intake pushrod while rotating the engine in the normal direction of rotation. When the pushrod moves up and then all the way down (intake valve just closes) install the exhaust rocker. Make sure the radius on the pedestal mates with the radius on the rocker fulcrum - the flat on the fulcrum goes up against the head of the attaching screw. Lube with Scorpion Cam & Lifter Installation Lubricant (part numbers SRPAL4-1 or SRPAL8-1) and lightly snug the rocker arm attaching screw with your fingers until the up and down looseness of the rocker is taken up (zero lash). Setting your torque wrench to 18 to 20 ft. lbs., turn the screw until the torque is reached. The screw should turn one half to one full turn between zero lash and torqued. This will give the proper lifter preload. If there is less than one half turn, a longer pushrod is needed. If there is more than one turn, shimming of the rocker stand or a shorter pushrod is needed. Scorpion Performance offers shims in .020” thickness, part number SCPRS.020 (32 pieces).