I've built a few brass chassis and have to say the challenge of getting the two sides congruent has defeated me more than once. What an idea with fantastic results to prove the quality of the concept. I will save this idea as one of must tries.
Curious question concerning the rotary table.....did Sherline do that to a table you already owned or modify their typical production? It seems so obvious, you have to question why they're doing it the way they're currently doing it.
I'll try to answer what I can. I don't remember many blown 409's in this era. A fan......if ran was a rarity although it would be doable. What you may find in Google searches are "retro rods" recreating a combination I don't remember competing in the sixties. Blown motors in this era (64-66) were small block Chevys, Olds (very popular), 392 Hemis. Fords were pretty much not in the picture. The 409 was a carbed motor more often found in stockers than in upper classes of drag racing. Of course this was an era of experimentation as drag racing truly was in its infancy. By '66, BBCs were becoming more common but were far from common. Blown Chrysler wedges might be in the gas class. Late model hemis were just barely being used in the top classes. Take your window to '68 and Hemis and BBCs were much more common in the gasser ranks. Legal gassers had to have a stock production frame in '64. By '66, I believe replica frames were allowed if they were made of square or rectangular tubing. Most were built of rectangular tubing. Round tubing was not legal for an NHRA legal gasser in this time period......I don't know if or when NHRA accepted round tubing. One other thing to remember AHRA and circuits were alternatives to the Wally show. I think that front wheel wells were optional although I'm pretty sure rear wheel wells were required. Oh yes remember headlights. I hope this helps.
I'd love to get Tim Boyd's or Art Anderson's take. If I remember correctly one of AMT's poorest sellers was the Thomas Flyer. The poorest selling series more than likely was the Aurora Racing Scenes cars. Please note I said poorest selling and not poorest kits.....those were great kits with unfortunately high retail prices.
I checked the one in Huntington, WV. They had 1/8 Canary T's and Exterminator dragsters. Almost got them and thought what a huge box to store. They did have the L700/40 combos, AMT 62 Corvette, 66 Olds 442 and Raminators. I couldn't find anything worth storing.
I think it comes down to what the items are. If it involved something I could buy at the local hobby shop, the answer would be unlikely. Any savings in trading would be ate up in postage. If what you have to offer is unusual in the United States or expensive enough to warrant the shipping, I think it might be worth your while. The problem isn't your location but rather the shipping charges. I know I used to trade with folks from Canada all the time until shipping rates went up. At one time, I could ship to Canada for within a dollar of shipping in the United States. Now the costs are at least 50% more. It makes trading more difficult to financially justify unless its an item I really want.