I got this used air cleaner boot and clamp from Jack Fisher.
Jack had noticed the NOS but "incorrect" 2-pleat boot on my engine and offered this used 4-pleat boot, which is the right one for an early engine.
He also had this late quick-release clamp:
It was pretty corroded but an overnight soak in Evapo-Rust cleaned it up nicely. Evapo-Rust is great stuff for de-rusting small parts. While not "correct" for an early engine, this clamp will make things a lot easier on tune-up day. I'll just have to remember to put an early screw clamp back on whenever any 1500 Club fact checkers are in the vicinity.