running into same problem.. have a comp xe274 that requires double springs. im trying to find a single spring that will work so i dont have to machine nothing
Don’t do it. Just machine the heads and use the right springs. The guy that did the porting on the heads for my 340 told me I would be fine running single springs with my Lunati cam, I believed him because I didn’t want to spend more money machining the heads and installing the required positive seals. And he was a long time machinist and Mopar guy so I believed him.
Guess what? I destroyed a set of rockers, because that guy didn’t know crap about my cam or what it needed (despite the fact that I told him exactly what I was using). The singles he said would work didn’t have all the same spring pressure specs, and I destroyed a set of rockers before I figured it out.
You already have the right springs and hardware, just have the heads done to use the right stuff.
