I have 1989 Shelby Dakota. I have just finished rebuilding the engine and have about 4 hours run time on it.
Problem: pushing coolant out in to overflow resievor causing the engine to try to run hot, This happens at 2000 to 3000 rpms in 2 to 3 miles on the hwy. Faster as the rpms go up. With the cap off you can watch the coolant flow from fast to slow as the thermastat opens and closes, no bubbles or coolant run over at idle.
Any ideas for med???