hofferwood
Well-Known Member
These are for my '66 Satellite with a '70 383 hooked up to a '71 727. All numbers matching (to something???).
The engine was "BUILT" by the previous owner of the previous owner. All I could get from the guy I got it from was "It's got a PURPLE CAM". Witch one he has no idea.
So I wanted the Sidewinder heads (just because). I talked to Todd at Marsh Performance and he said he didn't have any, and can't get any castings for 3 or 4 months----if then.
We talked for a while and he told me these are the same castings, and they do a good job on them.
Well I bought these fully knowing they have the wrong springs. They are setup for a hyd. roller cam. I got 'em and did the measurements on the spring pockets.
Then I talked to Todd and bought the right springs, retainers and keepers 10* (yes I wanted 10*).
They are supposedly










The engine was "BUILT" by the previous owner of the previous owner. All I could get from the guy I got it from was "It's got a PURPLE CAM". Witch one he has no idea.
So I wanted the Sidewinder heads (just because). I talked to Todd at Marsh Performance and he said he didn't have any, and can't get any castings for 3 or 4 months----if then.
We talked for a while and he told me these are the same castings, and they do a good job on them.
Well I bought these fully knowing they have the wrong springs. They are setup for a hyd. roller cam. I got 'em and did the measurements on the spring pockets.
Then I talked to Todd and bought the right springs, retainers and keepers 10* (yes I wanted 10*).
They are supposedly
- Valve Angle: 15°
- Valve Seal Material: Viton
- Spark Plug Type: Angled
- Retainer Material: Steel
- Maximum Spring Lift: .600" Hydraulic Roller
- Through Head Oiling System
- Standard Port Locations
- Bronze Valve Guides
- a 5-angle competition valve job, diamond-honed bronze guides, hand bowl blending









