Seems like I have almost talked myself in to building a Bonneville Indian Scout Probably AVF or ABVF. The rules for vintage engines is that they have to have original cases and cylinders or exact duplicates. All of the repro cylinders say that they are improved so the SCTA wont allow them. So I am looking for a pair of solid Sport Scout cylinders broken fins are no problem but they need to be thick enough to not need sleeves or valve seats, the crack at the head bolt would be OK. Oddly enough they don't care if I build my own heads. I plan to run NOS, alcohol and probably a blower so solid cylinders are the first Item on the list.