The 71/72 super pictured should already be 1600 dual port so the only bigger bus engines would be type4 1700/1800/2000 to use these in that super you would need a type4 210mm disc pp and flywheel, you would also have to convert the type 4 to upright and fabricate exhaust. I do this stuff for a living I do not know the forum rules like posting the shop contact info my contact info etc so if for now if you want email me your number I'll call and walk you through what you have to do. I would build a 2110 and forget the bus engine