5200 is permanent -- don't use it for anything you may need to remove again.
And I agree with jetlink -- it's not time to try out the new prop. It's time for a tune-up. You can buy a rebuild kit for that carb and go through it, clean everything and rebuild it very easily. I'd also replace your cap/rotor (still have points? I'd convert to HEI.) New plugs/wires. Check timing, replace fuel/water filter, etc. Basic maintenance stuff. Shouldn't be hard to get it to jump out of the hole.
Former owner of a 1987 Supra Saltare. Current owner of a Malibu 23LSV.