i have a 94 s10 blazer with the 4.3 v6..i am wondering if a 305 outta an 83 camaro will fit in my truck,,and if so what would i have to do to my engine bay for mods to make it fit or anything...and would the stock camaro muffler fit if i wanted to swap it with mine cuz i have a nice gaping hole in mine

 

It'll fit. The electronics are going to be fun. As you have a 1st gen, check out JagsThatRun.com. They literally wrote the book on s-series motor swaps.