Rocker arms

[Raymond Griffes]

I am looking for a shop that cuts and welds rockers for a 37 JD A. I have been told this will give me 5 to 7 more horsepower. I have a late A crank and a 620 cam with high compression pistons. Any help?

 

[SUPER MTA PULLER]

If you are a decent welder do it yourself.Measure from the center of the pivot to the center of the valve and to ccenter of adjustig bolt.A ittle simple math will get you a ratio cut and shoren as desired.Just be particular to wewld striaght and bolt at same angle as before,a cocked bolt will change the actual length.I believe Murphy uses 2 to 1 ratio on his.I have done a couple of sets with good results just take your time and be particular.