[shifty]

Any of the information on the GenIII (LS1/LM7/LQ4/LQ9) motors here at the forum will suffice for you, they're all GenIII engines, they're all SBC engines - only diff'ce is, the GenIII mount location puts the engine 4" farther forward in the bay compared to older small block chevy engines - and all of the parts that work for one should work for the other, it's no big deal. In fact, the LS1 and LS6 are basically the same platform with a few external parts changed here and there and slightly diff't specs.

All of your questions are answered in the GenIII threads here at the forum - like converting to manual speedo when using electronic tranny (via tailshaft change, $600 is cheapest you'll get), trans mount is no-brainer ; CPP has a great tubular mount, motor mounts - it's a SBC, there are a dozen adapter plates on the market, or you can make your own, or you can get 73-87 mounts to use the stands, and bolt the top-half of the LS6 mount right to them, shift linkage has been covered in other threads.

I suggest you do some reading. If you need a starting point, hit my personal LS1 swap thread linked in my signature. Please check out links to other forum member's build/swap threads on the first page so you can branch out and see several swaps.

Bottom line: There is no single "correct" way to do this. There are a thousand options you can choose. It's up to you to decide what is really important, what works best, and what is in your budget. Nobody here can help you decide that ... except you.