Setting up my heads (Edelbrock RPM) for an aluminum rod 383. On my old 383 906/OEM rods I was spinning 6800-6900 through the lights, so I am thinking with the new combo I will pick up 3-4 mph and be spinning 7200-7300 so I have upped my spring pressure to around 410. It took some time to find the right spring which I now have a set of Comp 929 and 977. My problem now is finding retainers that fit the springs. I have a set of Comp Ti to fit the the 977 spring but they are 7 degree. Just wanted some feedback on running the 7 degree locks, as I have read where some shops do not hesitate to run 7 degree stuff while some claim pull through at anything north of 350. I am 155/410 at .580 net lift

When you are sizing retainers if you can get within .010 for inner and outer is that sufficient or do both really need to be a press fit? The ones I referenced above are .000/+.010 which at this point I am calling good.

Thanks for the help.