heard the words that strike fear into any racer...NATIONAL BACKORDER when i asked my machinist to order some king main bearings for the 470. took vacation hoping to get this heap at least to the long block stage. not really familiar with different main bearing options for this. much rather use 77's over FM. what are the different bearing styles you guys are using? are there any concerns with the thrust size? should i just use standard full groove trimetals? iirc the kings are full groove. who sells the 3/4 grooves i've seen mentioned?

thanks