*points to Keep's post*

Best to go by test results. Going by what "a friend of Bob's sister-in-law that used to be married to Bubba on the other side of the tracks who knew a guy that used to watch races" is not my cup of tea.

My 5.0's have always had FL1A's. Zero issues.

Well, whenever I keep my oil pump driveshaft in one piece I have zero issues.

 

I sand blasted and pressure washed the underside of the mustang. After that I sprayed a couple coats of Herculiner on. I think it worked out well.