Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
|
#16
06-14-2016, 01:22 AM
|
||||
|
||||
Re: 70 W 30 rebuild
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 83hurstguy</div><div class="ubbcode-body">The challenge of the roller cam in an Olds is the 5/16" rocker arm bolts. There are two basic options... the first is drilling the expensive/rare heads for a 3/8" or 7/16" stud and adding guide plates. Option 2 is the Harland Sharp 5/16" bolt-on mini-shaft rockers, which are around $450, and good to 350 lbs open spring pressure.
With roller rockers, you'll have to modify/remove the stock valve cover baffles or double up gaskets. Ram Air Restoration makes a 0.200" thick hard rubber gasket that's a nice piece. The stud mount rockers may clear with a short poly lock, but the mini-shaft ones hit the baffles at max. valve lift... went through figuring that out on my old '83 the hard way. No doubt a roller is the way to go, other than those pesky Pure Stock rules. I'm stuck with the flat tappet for mine. </div></div> thanks for the info..speaking with the builder...stay tuned... [img]<<GRAEMLIN_URL>>/smile.gif[/img]
__________________
1969 9566AA COPO Chevelle M-22 1969 Malibu 489 ZL-1 T-56/4.56 1969 Beaumont 540 th400 3.70 1969 Chevelle 300 Deluxe 427 ZL-1 M 22W 1970 Olds 442 W 30 2 door post 1969 Ply. GTX 426 hemi auto. Blue. 1940 Dodge pick up Durango 4X4 1968 Camaro ragtop LSA ZL1 
|
|
|
Threaded Mode