340 Swap

The thing that really matters is the cranking cylinder pressure. You can tell an awful lot from the numbers. And the best thing is that the only thing that you need to put tools on, is the sparkplugs.
After 10 years I would do two Compression tests; First a normal dry one, then another one after oiling up the cylinders, just a lil.
BTW
just so you know,
my 1969 FSM lists the brake stall of the stock 340TC, as; 2350+/-100rpm.
IDK how that compares to real life, cuz I never had an auto-equipped 340; mine were all A833s