Its easier if u put your cam in before your crankshaft. U said your main bearing clearance is .0015. That is very tight clearances. I know the book says the clearances can be that tight but its usually better to have your bearing clearances alil wider than that. If u plan on reving this engine like a performance engine you will defenatly want them looser. There is a saying, when if ur bearing clearance is to loose you will know when u drive it. Becouse ur oil pressure might be alil lower than desired. But if ur clearances are to tight, everybody will know when u drive it! Becouse it will blow for everyone to see. I hope that dusnt happen, but i want u to know its better to coution towards the wider bearing clearances.

Wow so this is your very first motor I can see plainly .. good luck ...