Quote:
Originally Posted by DeadheadNM
Brake booster related
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Darn, I already gave it away. I'm removing it now
Guess again
Quote:
Originally Posted by Curtb1971
Pulled a front bumper of a unmolested 72 the other day and it had L8 bolts that attached the bumper brackets to the frame. Is this where your had the third option?
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Just what few I've seen I'm surprised GM installed GR8 L8 bolts for a chrome bumper. Or any bumper unless HEAVY duty, but I'm no expert. Better the bolt busts then your frame I suppose, but your left hand horn will crack anyway if you strike a boulder, ask me how I know. Prior owner.
Per my 71 L8 was used:
STEERING BOX BOLTS
UPPER CONTROL ARM BRACKET BOLTS - TOP These bolt on to fixed nuts like for the steering box. My truck had three original types, all GR8. One L8, One stamped with a circle, and two stamped with a dog bone.
ENGINE CROSSMEMBER TO FRAME RAIL WALL BOLTS. If memory serves me these take fixed nuts as well. So in a nutshell, if there's a fixed square nut in the frame for a 7/16" bolt you can bet it probably calls for GR8 "L8" type bolt.
On a side, I think there are many misconceptions where a GR8 should be used, GM didn't install many for good reason. I can say unless perhaps pulling a block, GR8 is out for long block components. Matter of fact someone long ago busted a GR8 on what's now a LH head, likely from doing just that. The heads came off a 68 Camaro BBC. I spent many hours drilling it out, and if not for my B/A son it would have been many more. I tapped it 7/16, though the hole isn't used.