Can you just push the pulley further up the shaft and leave the crankshaft sticking out an inch below the pulley? If necessary you could drill and tap the pulley for a grubscrew to retain it.
Paul, Briggs & Stratton have two standard shaft lengths on most of their engines (including the mid-sized ones), measured from the engine mounting flange to the drive flange. The shorter one is usually about 62 mm and the longer one about 80 mm, though the best I've been able to do measuring my Victa shaft gave me 87 mm. You could look this up on the internet to try to get accurate figures for your engine, but if it is about 80 mm or so, you have a long-shaft engine. Remember to measure from the engine mounting flange, not the oil seal where the shaft comes out of the sump.
