Mancini rocker questions...

I went budget with 273 rockers, now I'm worried about how much of a gap is needed, called Mike @ B3, he said he shoots for about .035. I'm there on some, not on others. Glad for .024 and .035 welding wire though. My heads are bolted down already and he said relocation would involve taking them back off again to clearance the pushrod tunnels. It will be fine if I can get the pushrod length right the first time.