I'm looking to get some nice Longtubes for my LT1 swap, not sure if I'm going to run into any fitment issues? T56, LT1. Give me some ideas.

 

IMHO the best LT1 longtubes are the hedman d-port.. they tuck up quite nicely and are a good compromise between ground clearance and power.. With my setup and a dual hump xmember the exhaust is no longer the lowest point underneath the car.

Part number: 66469 d-port longtube coated..

Notes from the install from another post are below:
The hedman longtubes took much longer than I thought..Installed both from the bottom, I have a/c.

I had some common trouble. Drivers side, I pre-notched the rear a-arm mount to clear, after fitting I had to dent the #3 primary which was a bummer, it was hitting the k-member.. other than that drivers side slide right in.

Passenger side was a pain, had to remove the starter (no biggie) but no matter what I could not get the flange to clear the firewall, ended up lifting the engine on the passenger side but still wouldn't clear, so I took a bfh and shaped the firewall a bit and then whacked on the rear of the header flange from under the car and it went in..

Even with the above, they were worth every penny... the downside is they are 1 5/8 rather than 1 3/4 like the hookers.. but I wanted the clearance. They fit with the t56, you may need to get some insulating tape to cover the fuel lines and slave cylinder however..

 

If money isn't a issue id check out some lemons headers. Id give them a call and see what they can do for you. http://www.lemonsheaders.com/main.htm