My draft tube was clogged with carbon. I burned it out ðŸ‘
My old 235 had been dormant for many years as it sat in several barns and no telling where else it was till I got it, broke it free and put some miles on it. You can see a hose going in that valvecover cap in the pic. Cap is full of coarse stainless steel wool. It ran so much better after I put that vacumn to it 👠.
1962 C10 with a 235 6cyl -- all of the drive train seems to be original. Some of this story is in the Side Lot Some people like a new truck. I liked the old ones.