There is a difference in early 305 engines and the 92 305 that you have. The LT1 and later 305 engines used a one piece rear seal and had a smaller bolt pattern than the early engines. The LT1 probably uses a larger flywheel to match the starter and the bell housing. That would be the flywheel that I would use.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine