SBF Aluminum Flywheel Internal Balance works with 10-10.5” Clutch set ups .Unsure of Actual Brand Name ,but it looks exactly like a Mcloed ,Hays,Etc. 164 teeth that look great basically …new . Bolts to Ford: 221,255,260,289,302,Boss 302 , 351w,351c,351m,and 400