I think rising rate fpr's are doo doo. It's like the bonehead trick I pulled on a turbo Opel where I triggered the cold start injector for boost enrichment with a hobbs pressure switch. It's just a bandaid for lack of proper mixture control, and, as you found, a ticket to the big clanky in the motor. We even did stuff like putting a resistor in the ecu cts wire to make the ecu think the motor was cold and use cold start enrichment. I had one version with multiple resistors and pressure switches to give a range of enrichment. Didn't work worth a hoot.

Just oil the head bolts and washers and torque it down to 80ftlbs in three stages, 35, 60, and then to 80, following the book pattern. Out of an excess of obsessiveness, I tap the head with a dead blow hammer after the first pass to make sure it's settled all the way snug and not hung up.