71 Duster 360 turbo build

Half way through valve spring replacement, and I have to say I’m glad I’m going through the valvetrain. The Speedmaster valve locks are in rough condition. Possibly because I was floating valves, but the majority I’ve removed are chewed up. The intake springs were all shimmed with 4 x .020 shims; 2 x .020 shims on the exhaust. Retainers and valves look fine. I’ll be sending the heads out for new valves this summer, and hope everything holds together for a couple races before then.

I’m also hoping to replace the lifter retainer wire clips with internal snap rings while I have it apart. If I can find them in time.