I used the 1/2" NPT ones in the block drain holes of a 383. I also got one from J.C. Whitney that hangs inside your radiator under the cap. Boat Zincs has all kinds of them, maybe something that will work in the pump housing. http://www.boatzincs.com/engine.html

Last edited by Jim_S; 06/24/10 03:13 AM.
69 Roadrunner 383 stock