I put 1.48 springs on these G1 trickflows and it look like it is going to rub the underside of the roller rocker. Trickflow roller rockers aswell. part#31400512.. what should I do? I don't feel like grinding the underside down to have them fit. Or is there another roller rocker that will work.?

 

Here is a list of the recommended rocker arms by TFS from years ago. I never got the part numbers so I don't know if your TFS ones are correct. Will list for searches though.

Here is a list of the recommended rocker arms by TFS :

Competition Cams "Pro Magnum"
Crane Cams "Gold"
Summit "Extruded Rockers"
GM stock stamped steel (For camshafts UNDER .450" lift...)
TFS

Here is the list of rockers TFS DOES NOT recommend:

Competition Cams "Magnum Roller Tip"
Crane Cams "Silver" (Energizer)
Harland Sharp
Proform
CAT


That said, I'd call TF as they now allegedly have good customer service. I'd have to put my WAG as inccorect geometry or parts. Verify with TF as the G1, while a very good head, was a PITA to set up correctly and led to it's ultimate retooling and demise.