[Slick]

Blackwood Goat,

Before the repair, the motor would overheat whenever in traffic. I couldn't even run the A/C. I wish I could say that I changed nothing else, but unfortunately I changed lots, even the car (but both were A bodies). The last time I used this motor was 8 years ago. This year, I needed a temporary motor to get the GTO running again and figured this would work. Since there was already a heating problem I knew that it needed to be addressed. I was already using a 4-row radiator, 19.5" factory flex fan, etc.

When putting the GTO on the road, I found a wiped cam (old solid lifter, but pretty mild) cam. The car before, also an A body, had manifolds, 2.5" duals, T350 with 12" converter, separate trans cooler, Q-Jet, iron intake, etc.

Now, back in the 71, the car has 1-5/8" headers, 2.5" duals, cooling as mentioned previously (same fan actually), T400, 10" converter, Summit 2802 cam, iron intake, Q-Jet, etc. Same 7K3 heads and short block as before. Since the same front cover was on the motor from its overheating days, it was easy enough to check and sure enough there was a sheetmetal impeller pump with God knows how much clearance, certainly over 0.150".

The change was so drastic, I know the proper pump impeller and clearance did the trick. The motor used to heat up badly before even when the cam was new and not wiped.

Stuart