67 B-M Camaro

[Supercar_Kid]

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But what about the disc brakes, 12 bolt, 4 speed, HD cooling, springs, etc that go along with the SS and Z28 cars?

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According to the Camaro Research Group, the 12 bolt rear was standard on 1967-8 L30/M20 cars from approximately Dec 1966 through the end of the 1968 model year. Also, SS models didn't come standard with disc brakes in 67 or even power assisted drum brakes for that matter. Yes it's true the Z/28 package included power discs in front, but back then PDBs weren't fully accepted as being a must have performance option, especially among drag racers only concerned with stopping at the big end. Heck, most guys would have told you take the 2nd turn of road and save your money for speed parts, or you could have simply picked a PDB optioned 327 to begin with. Also, all 67 models used mono leaf springs in the rear, while there were undoubtedly different rates depending on which options the car came with (engine, A/C, etc.) I doubt it made much difference once Joel & Co. put the "Super Bite" goodies in place. And from a drag racing standpoint, there wouldn't really be a downside to having the lower rate springs in the front, as they'd let the heavy big block sit low until you nailed it on the line, transferring the weight to the rear and firmly planting the slicks on the 4.10-4.88 geared rearend set up, kinda like 90/10 drag shocks. While I'm no old time drag racer, I think it makes a lot more sense to start with a much cheaper L30/M20 car and go from there, rather than start with an SS or Z/28 car and try to justify the price difference. Only Joel knows for sure.