High ratio,magnesium rockers for the 235 261.The box has a label from "Jakes" the original price was $32.50.I'm saving them for a McGurk equipped 261 in a 32 chevy coupe.The parts pile keeps growing.Long way to go.
Just be careful when you are running the magnesium rockers. Have them checked very carefully. With time magnesium gets brittle and tend to come apart very violently. Thats why they stopped making them in the late 50's to early 60's.
I have 2 sets for GMC's, NOS in the boxes. The high lift was done by short sideing the push rod side. The stock push rods "may" not rub in the holes but 5/16" or 3/8" need clearance work on the head. If you put these on a a roller cam with the higher valve spring tension needed the rocker could fail a lot easier than use them on a very mild street application. They are very light and use the stock adjusters....Good Luck
216.158 MPH 12-Port 302 GMC on 70% 171.0 MPH 302 stock head on gasoline 7 years later
