'69 Grand Prix, #s 400/4-sp, Silver over Blue

[grantprix]

My brother's '70 GP made it to 90K before it jumped time and left him stranded. He bought the car in the early 80's with 29K miles.

[60sStuff]

The dreaded nylon camshaft gear.

In regard to the Pontiac GTO, plus other GM models and/or manufacturers.

1964 and 1965 used a Hardened Alloy Iron gear.
1966 through 1972 used that “stupid idea” Aluminum Alloy with Nylon Covered teeth.

[Too Many Projects]

Replaced dozens of those in all GM engines but Cadillac. Might have had it, but I don't recall ever working on one.
We always quoted the customer a price to replace the gear set and another to remove the pan and clean all the crap out, that was restricting the suction screen on the oil intake tube.
99% just paid for the gear set change and then sold the car. Some came back later for LOF's in Ford's and Chrysler's. They said they didn't want to pay for that again. I reminded them that it was noted on their bill that the replacement set was steel and would outlast the rest of the engine.