Another small block turbo early valiant

Maybe boost creep due to the waste gates take off angle? Most get it when waste gate is not at the right angle off the feed, thinking since yours is 90 degrees might be the cause. Boost creep is a condition of rising boost levels past what the predetermined level has been set at. Boost creep is caused by a fully opened Wastegate(s) not being able to flow enough exhaust to bypass the housing via the Wastegate(s) itself. Just shooting out ideas

well ****, I think your pretty spot on. I can’t believe we didn’t catch that during the build.
Hate to see you have to redo the wastegate, you did such awesome work on this set up. I'm betting you can use the same hole just oblong it and smooth the transition pipe to the gate. Course that changes others things that need to be welded up again.

yeah I had a friend do the fab work on it. He’s always super busy might be difficult to get it back to him soon. Maybe I will just have to do it over winter. That would be a good time for him to add in a air to water intercooler!