Machman

Flow cooler. I had the same issues. Stock water pump.

I did it last year on my 70 and it works excellent. I used the adapter on my ps drag link and ran the non roller idler arm. I have zero steering wander and the response is great. I adapted a saginaw pump to my factory pump bracket and used the inline six hose set. I set the specs at 4 degrees caster, 0 degrees camber and 1/16 inch toe. Tracks great and I dont have any abnormal front tire wear.

I used an OPR z bar on my 70 351c tremec with power brakes. I had to modify the top of the z bar to clear the bottom of the booster.