well it has a 356 cam, pistons with a very high dome and grooves all around the skirts, no bolts on the crank and as i was reading on another post there is a date code on the bottom of the cases 6 1 57 the cases are a matched pair as they have the same numbers on each side at the front, dont know about the head yet or what to look for, cylinder is 67-1210
in the boxes of bits with the bike and 2 engines was a 357 cam, a TT9 carb, a pair of carbs 386/324 and 386/325 with only one float bowl,
6 wheels and a complete front end with a finned gold star hub i believe ( small holes and larger ones that you could knock out)
i find this all very interesting finding out about all these parts