Bought a front drive kit for my LT4 from Drive Junky. Power steering had a little more effort than I liked. Called Zach and he said the GM type 2 pump that he supplies has a valve in it that supplies about 2 GPM suitable for Mustang 2 Suggested I get one for 3 GPM for my 80's T bird rack. So bought the black one off summit but only goes in part way before it gets very hard to turn. Threads appear the same. The only difference between the two seems to be the main body port size. .150 for the black to .125 for the silver. Thinking I may just drill out my original. In my inspection I noticed on the original the small port just above the "O" ring goes through on the new black unit but not on my original silver one. Was going to drill it all the way but it just a bit smaller than 1/16".
Anyone have any experience with these?