It would only be a 1300t if it had the 2 speed. The 2 speeds would have a bump out and manual lever on the clutch cover. The 2 speed worked like the HealthKit boonie bike. I know they advertised the 1300t on the front peg models but I can’t recall ever seeing one. Most are regular 1300. Many 1400t midpeg out there. Seems like bonanza didn’t go by the book or the brochures anyway. I’ve seen a lot of original models thrown together with whatever they had on hand. But anyway you can get away with using an h35, hs40 or h50. I personally think they look best with the big block.