70 W 30 rebuild - Page 2

**Alss** · #11 06-12-2016, 11:23 PM

keeping the block..going 060... forged pistons comp ratio 10.5 or so, arp bolts and a shotpeen for the rods. polish crank, heads are in great condition..clean em up ..some new stainless valves and a three angle..new cam....assemble [img]<<GRAEMLIN_URL>>/smile.gif[/img]

**Ryan1969Chevelle** · #12 06-12-2016, 11:45 PM

Better read the PSMCDR rules, no rollers, and by memory cam lift has to be within 2% of stock grind:-)

Postsedan · #13 06-13-2016, 03:13 AM

Al.....build it the way you want to build it......we'll make our own race sanction.....we'll call it
"BaDa Bing, BaDa Boom Racing".....Race what Ya Bring [img]<<GRAEMLIN_URL>>/

[/img]

Dan

**Alss** · #14 06-13-2016, 10:25 AM

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Ryan1969Chevelle</div><div class="ubbcode-body">Better read the PSMCDR rules, no rollers, and by memory cam lift has to be within 2% of stock grind:-) </div></div>

Houston, we may have a problem...WILL NOT use a flat tappet cam!..no way I'm spending good $$ and putting in a cam that may or may not survive..will be mild..and close to stock, but def a hyd roller. [img]<<GRAEMLIN_URL>>/smile.gif[/img]

Postsedan · #15 06-13-2016, 12:00 PM

Exactly [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

Dan

**Stefano** · #16 06-13-2016, 04:05 PM

Dick Miller racing has a modified timing chain cover, looks stock when installed as its a stock one cut in 1/2, just in case you want to make cam swaps easier.

83hurstguy · #17 06-13-2016, 04:42 PM

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.

**Ryan1969Chevelle** · #18 06-13-2016, 04:51 PM

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Stefano</div><div class="ubbcode-body">Dick Miller racing has a modified timing chain cover, looks stock when installed as its a stock one cut in 1/2, just in case you want to make cam swaps easier.
</div></div>

Works for small blocks?

As far as I have researched this should be true:-) I want one!!

Ryan

**Ryan1969Chevelle** · #19 06-13-2016, 04:53 PM

<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>

Luke is a wealth of Oldsmobile knowledge:-) (I think he looked over this car at MCACN before it sold to Albert....)

Ryan

83hurstguy · #20 06-13-2016, 04:57 PM

All Olds timing covers are the same from '64-up, so it should work.

Thanks for the kind words, but I'm no guru. At the rate you're going, you'll have more Olds experience than me in another week or two. I did spend some time at MCACN sitting next to this Olds in the post car display.