My macinist installed the pistons on the rods like a Chevy. Tangs towards the oil pan and valve pockets in the wrong location. The rods were also resized with ARP bolts. Question: Since the rods were resized do they have to go back in their original stamped location? #2 If they can be moved around will my balance be totally screwed up for a street car low to mid RPM no more than 5500 RPM rearly during burnouts. I measured rod and piston combo #1 & #2 the weight difference was about 10 grams. All the clearances are the same for all rod jounals

 

So you obviously didn't get it balanced. Take everything back and have the do it right. Simple as that.

You should have all bearing tangs to the outside but you have a left and right piston. Have them follow this info and you should be fine.

Lately I've had a lot of guys telling me of machine shop screw ups. If any of you have talked to me lately you know that I don't trust too many machinists, this just proves my point.
Are there good ones put there? Of course there are, but remember guys if it's not been done correctly you have the right to demand that they fix it, period.