untill the new 3.7 came out the 4.3 was far and away my favorite v6 gasser. this is a worthy gig imo.....both the 700 and 4.3 are very delible all around. just the way it is.
as to the ford chevy a/c stuff you sort of correct.
i have put a 6.5 and 6.2 with ac in a f/s fords before. i had to bend the line around a bit(original gm lines) and pull one little filter screen deal but the hi and low lines screwed right together....like 92 gm into 91 ford...there was some other little bits but it wasnt anything big like some of the other systems...i was quite surprised in one sense but at the same time it made sense. hooking the compressor clutch up was actually a bit more difficult and i think i had to use a different pressure switch and adapter...not sure its been quite a few years. i had to go with the gm cruise control...the electric style. but that was easy as they had gm transmissions too. just hard mounted the control stick on the dash lip.
well i was proud of ya till i seen this
should have been done in two-three weekends tops dude....