David, has the right of it.
Monetizing everything only works in the short run. Then, the customers depart, and there goes the magazine(or whatever). But, no matter. The Folks who monetized it got theirs, so "It's All Good"! TM
The Sheet Metal changes in 1966. So, a whole new body would need to be tooled up. I'm not sure what parts (if any) would carry over to the 1966-1967 car. Since it was a 2 year only body style, that would make a business case for new tooling a bit harder to justify.
But, one can always hope.
I also think a Ragtop or Four Door body might be possibilities for a future extension of the tooling. ( I'd prefer the 4 door Sedan, but I think the 'Vert would sell better)
I have a pair of Monogram '39 Chevy kits, that are waiting this exact engine swap.
Any problems getting it to fit?
I see you used the Automatic from the Sedan Delivery Kit. Would the other trans from the '53 have worked?
Cheers, Alan