[Matt Cramer]

For conversion mounts, you can fab up a set yourself using dimensions given in the LS swap forum, or there's a ton of bolt on options as well. I cut a set out of 1/4" steel stock myself - see my build thread for details.

Most factory truck LS manifolds have a few frame clearance issues. If you want manifolds, Trailblazer SS or 2010 and later Camaro manifolds have good clearance. There's also a couple headers.

For radiator hoses, I used a set intended for a 2005 Silverado. Had to trim a little off the lower hose, and put dish soap on the ends to get them to slide over the (somewhat larger) fittings on my stock '72 radiator.

I just used a tubing bender and made my own fuel lines.