Here ya go, Stew: 5/16" NF for the tranny: top two are 2", three for the side are 2-1/2" and the bottom two are 3". I've used Nylok nuts on mine. Starter has shouldered 1/2" NC, 2" long to thread into the transmixer bell-housing... Keep in mind this is a 3-synchro bolted to an 18GB. YMMV. /bcforum/images/%%GRAEMLIN_URL%%/wink.gif