If I would have flipped the page in the bearing catalog. I would have seen the casting number again. This time it relates to line 48. Also the guy changed his ad and no longer claims it as a large journal. I'll add some screen shots here for when the ebay ad disapers.
The L99 4.3 L (263.1 cu in; 4,311 cc) V8, produced from 1994–1996, shared a 3.736 in (94.9 mm) cylinder bore with the 305 cu in (5.0 L) but had a 3 in (76.2 mm) stroke compared to 3.48 in (88.4 mm) of the 305 cu in (5.0 L). The pistons used in the 4.3 L V8 were the same as the...
They fit like a glove after I removed these 2 braces (pictured below). They are within 1/4" of the floor. I have 1/8 clearance to the brake line that 1980RS mentioned. Let the right header hang on 2 bolts and poped the starter in with ease.
Another option is to drill and tap the intake flange of the Vortec head to except the early intake manifolds. We were doing this in the late 90's before anyone started producing manifolds for the Vortec.
Put some kind of clamp on the rubber fuel line to shut fuel off. If it starts and runs fine, let it run until it starts to run out of fuel. Then release the clamp quickly. This well most of the time flush debris from the needle and seat.
How many sensors on an injected engine? Any one of them fails and your walking. I carry a spare points distrubutor and a mechaical fuel pump in the trunk with some basic hand tools. I have never walked home with a carburetorated gen 1. Just sayin.