The old flywheel was showing its age so I decided to go with a new Ford Motorsport steel billit flywheel and new ARP bolts. Before I installed the flywheel something told me better count the teeth to be sure I got the right one. Yep, new one has 157 just like it said it did on the box. I counted the old flywheel and came up with 160 teeth, I counted 2 more time be be sure because I've always heard Ford used either the 157 teeth or a 164 teeth flywheel. I Goggled this number and found out that Ford used this flywheel in the early small block years and it will be alright to replace with a 157, only that the starter will sound a bit different.