Junkyard parts question

I needed a complete set of bolts for all of the accessories and water pump. SO I went to the jy. Well I found a complete 5.0 engine, but it was a 88 t-bird (my 5.0 is a 88 as well). On the surface everything looked as it would on a mustang. My question are the bolts and accessory brackets the same as a 5.0? I grabbed all the bolts anyway, but I was thinking about going back and grabbing the brackets. Do they setup the same?

Also on the same car. I had to drill out and retap and bolt hole on the block (one of the ones that takes a bolt for the water pump). So now one bolt has to be abit bigger. Will that cause problems down the line? Besides have to bore a hole hout everytime I change the water pump. Also where can I buy a bigger bolt?

Thanks

Bolt had broken off in the block and I couldnt tap it out so it had to be drilled and rethreaded , but now I need a bigger bolt and have to drill out one of the holes on the water pump.

Thanks for the advice on the bolts. I doubt napa would have them all, but will check. Just wanted to make sure that the 5.0 engine in that t-bird is the same as the 5.0 engine in my stang. I assume it is since they are both the same year.,

actually no, what is a helicoil?

edit
Well I google helicoil and I think I understand what it does. Where can I get it from? Anyone ever tried it?