My new /6
Tune-up parts and technique suggestions in
this thread. Carburetor operation and repair manuals and links to training movies and carb repair/modification threads are posted
here for free download. '72 was the last year for points ignition. See
HEI upgrade .
Rattle on cold start: Use a good quality filter -- not a Fram. Try a NAPA Gold 1806, which has an inbuilt standpipe to keep oil in the base-down filter after shutdown for quick relube on cold startup. It will also be a good idea to service the oil pressure relief valve to make sure it's doing its job (if it's stuck partway open it'll take a lot longer to build oil pressure from cold), as described in these two threads:
thread 1,
thread 2.