First...I appreciate everyones input. This is the first I've heard of the touching thing. But ya know...this is the only engine I've built, so it's theoretically possible I missed something. LOL
I've read the 1/4-3/8 in various forums...this included. In shopping for a new pickup, I came across this in 440source. Both indicate a required space between pickup and pan.
I originally built it with a 1/4"-ish gap. Then blasted terra firma with it, precisely closing that clearance to basically nothing. No i have pressure issues. THIS MAY NOT EVEN BE THE PROBLEM. I'll find out soon.