I recently purchased a set of PRW PQ series rockers for my moderately built 390. The fit and finish seem great so far. Won`t know anymore until I get everything set-up and adjusted properly. My understanding is when checking for pushrod length, you bring the motor to TDC, then using a pushrod length checker at #1 cylinder, you adjust the pushrod until you notice some resistance while slowly rotating the pushrod. Then measure the pushrod length and order pushrods to this exact length. But should the lifter be collapsed when doing this? The rockers came with two pushrod length checkers, but when completely screwed all the way together, they only check 9". When unscrewed you only gain about a quarter inch more. They seem way short of what the actual pushrod length should be. I tried to search this forum for the proper adjustment procedure but the search engine leaves much to be desired. Any help will be greatly appreciated.
Scott my son and I recently did exactly what you are doing, engine and PQ series wise. Ours is hydraulic lifters and PQ series rockers. Summitracing has Crane pushrods that fit our deal perfectly. CRN-34645-16. They are ChromeMoly 3/8" at 9.234 long. Slightly less than 100 bucks and look very good.
When you install your PQ setup watch carefully the radius on the end support stand for clearance with the rocker at the bottom. Ours needed a little "touch up" to make sure we had enough clearance. Good luck with yours.
They are nicely packaged. Obvious import parts. Come with a full array of pieces - shafts, stands, spacers, rockers, studs. So far they look like the shafts have a rather rough surface finish, and the bushings look rather thick compared to the cross section of the rocker body - not likely to be very strong. Still could be a viable option for a mild street build. I need to mount them on a head to verify geometry....right now both engines I'm assembling are BT headed...
