congratulations on your nice-looking 40
another endorsement for Richard - best to contact him
@richardlillard1 through this forum
on emissions-related issues, I bring my 40 to another old-school shop just about three blocks away from Richard - they have the equipment to measure emissions (and a hook-up with an old-school carb rebuild guy), they just don't have the manpower to spend the time driving your truck through the emissions testing station - but my 40 always passed after they took care of it
send me a PM on this forum ("communication" can be started under your profile), I'll send you that info

seeing that we are practically neighbors, we could meet up sometime around Labor Day and compare your '70 to my '72