I was wondering if it would be possible to just use the y pipe off a late model camaro for long tube headers? i was wanting to use hedman long tubes but would like to know this first.

 

you'll need to have a custom one made. You may be able to hack up a LS1 ypipe to get it to work, but I suspect it would be as much work as just starting from scratch.

 

LS1 Ypipe will not work, it's a true Y design and goes straight down the middle next to the driveshaft.

You might have some success with 93-95 Y-pipes, they're the closest to your setup. But I'd recommend just getting a custom one off done.