Interesting. My used 235 engine including flywheel from Shwanke Engines came with 12v starter and generator. I am keeping my 6v system. My rebuilt 6v starter cranks slow but it does start. Maybe my Shwanke flywheel is for 6v but doesn't care if 12v starter is used...not sure.

54 Chevy 3100 Deluxe 3 speed on column. Keeping original as possible but changed to 12 volt system.
JB Weld..."I put that stuff on everything"