46 years? even tho the 454 wasn't put into production until the early 70's when they stroked a 427? if I recall my engine history properly, the BBC made its debute in 1965, although I'm prolly off by a few/several years.
just because you havn't seen one, does not mean they do not exist... would they have wasted the time and effort to drill/punch the holes for a BBC engine mount on the mounting blocks, if they never put a bigblock in it?( especialy considering teh 4x4 crossmember doesn't resemble the 2x4 crossmember in the slightest) besides, money can make anything happen. the dealer may not have had the BBC in the option book, but I bet a little persistence on your part could have netted you a BBC K30 suburban. they are after all, there to please you, the customer, and willing to go a little farther, if it adds into thier commission. you can not tell me they don't exist, since you've never verified they don't exist, by either being a car sales man, or breaking into chevrolets office of records, and search through every single build sheet.
who's to say they didn;t sell 454 K20/k30's to the military? they sold 6 door suburbans to the government, and that would take a hella lot more work, then dumping a different sized engine in a truck. heck, according to everythign I;ve read about, they didn't even make K30's until 77. while this may be true, I'd be willing to be they had a heavy duty option that one coudl have asked for to get a D60 up front... then there's also all the smaller promotions like the Beau James camping special, the bonanza special, the coleman camping special, and hell, even the blazer challets are out there. why can't there be a 454 powered stock factory suburban with 4wd? I mean come on, if they put pontiac and olds disels in chevy trucks, why not a BBC in a 4wd? I call your bullshit, and tell you show me otherwise.
-Rich