dwg86 www.amracing.com It's a nylon bushing that fits over the end of the bolt. part #B006 $34.00+$5.00 shipping. I used on on my 401.
dwg86 No problems yet. The only special tool you would need would be a dail indicator. I installed the cam, cam button, timing chain cover with the gasket. Put a dail indicator on the back of the cam(removed the rear cam plug in the block), and sanded the cam button until I got .003 end play in the cam. It didn't take much sanding. It was pretty close.
jeepsr4ever You would know if you had cam walk if you see the head on the end of the camshaft making marks in the T/cover. OEM and aftermarket covers have a raised area to keep the cam from walking too far. The real only time it is required is with a roller cam. Just a public service anouncement.
dwg86 x-man wrotelooks like am racing is out of business . i tried calling but phone is disconnected . :-| I emailed them a week ago, and got a reply back. Maybe try emailing them.