Hi there, folks. As my username suggests, I have an odd-fire 231 V6 that I am currently rebuilding. I am a member of this forum rather than the Turbo Buick forum because this older odd-fire V6 has more on common with the small block V8 than to the later V6's that the Turbo Buick forum is all about. I'm a mutt stuck between two worlds. Take the Buick 350, cut two cylinders off, and that is me. Anyway, my poor V6 fried it's main bearings a couple months ago and damaged the crank quite a bit. I got it back from machining have been test fitting to check my oil clearances. I wanted to check with the forum here to see if my clearances are what they need to be. The service manual is rather vague. My main bearing clearance is 0.0020" to 0.0025" on all bearings, which are 0.020" over standard size. That seems about right to me but perhaps some of you have seen better results from running your mains a little tighter. The one I am really concerned about is the thrust bearing. My crankshaft thrust faces took a heck of a beating and the machine shop did not treat them. . I'm measuring 0.010-0.012" end thrust, the spec is 0.004-0.008". My options are to run it, send it back to have the thrust ground 0.020" oversize and I'll order an oversize thrust bearing set, or send the crank back and have them weld and grind back to standard size. I'm inclined to not cut corners on this engine. Other people cutting corners is why this is the third time in three years this engine has been rebuilt. I'm doing it myself this time because I'm the only person I trust to do it right.