@ Baba;
I made a spreadsheet on Pontiac cams BECAUSE I had hoped to find either a replacement 067, or the best substitute which might keep my car eligible for the Pure Stock Musclecar Drags;
The 067 is NOT availble.
Most vendors who say they have one are selling a replacement for the 066 cam;
That summit grind used to be known as the 067HL (HL stood for High Lift).
if we take a snapshot of the 1968-1972 model years, the 066 and 067 could be described as follows:
067: 4bbl cam
066: 2bbl cam
Neither of these cams were used for the higher powered engines;
The 067 was used for the base GTO’s, and the 066 was a small step down from the 067.
It reads as though you might be on the cusp of driving yourself bonkers trying to figure this all out;
Short of spending money on an NOS 067 cam (there are a few out there) you’re either going to go for a slightly larger cam, or downgrade it.
I would suggest either getting the 068 replacement, or the summit grind.
The logic behind the “067HL” was that many people were using 1.65:1 rockers in place of the stock 1.5:1 rockers on the 067 grind, and this grind was essentially supposed to replicate the 067 with the 1.65 rockers.
Please don’t drive yourself crazy trying to find a cam grind that cannot be bought new.
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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.
1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
Last edited by unruhjonny; 11-02-2025 at 04:13 PM.
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