Just keep everything stock from bellhousing back and do not swap starters, flywheels etc keep those 216 pieces. Guys get into trouble on this thinking they need a 12v starter when your 6 volts starter LOVES 12 volts. I've had my 46 and 261 motor together for 20 years, still using the foot starter. Stock accelerator/bellcrank on side of block, these items may need tweeking if you go to multi carbs or 4 barrel, otherwise all should be fine. I went with the next size up 11" truck clutch just because I had the parts (takes different flywheel, pressure plate and disc).
You can use the the 261 flywheel but you cannot then use your old 6 volt starter, these thing must be kept as a set as the geers must match.
And get a Patrick's catalog, how to section covers all this stuff.
Last edited by JiMerit; 10/10/2009 3:44 PM.