I posted some either on this forum like 3 years ago, or on Performancetrucks.net I will look.
I tried to find it, but no luck, it's 3+ years old now. 1BADC10 had a thread on LS1Tech or PErftrucks where he chronicled his swap. Him and I were doing our swaps at about the same time (I finished first ) and I know I posted some pics with dimensions. IF I can find my drawings, I'll repost.
Here are the critical dims.
LSx block bolt pattern is 111.76mm (aka 4.4") wide, and 78mm (aka 3.017") tall.
The old small block pattern is 3.48" wide x 3.1" tall. The lower bolt is directly in between the upper two bolts. Most of the flat adapter plates end up looking the pic attached. The only issue I had with this was that it puts the engine about 5/8" further forward, so that the driveshaft had to be lengthened. I ended up redoing my plates so that the engine sat 15mm further back, and I could reuse my driveshaft. I have a RCLB truck, and has the longest 1-piece driveshaft, so I didn't want to have to make it any longer.
3 years later, the truck is still running great, and I am happy with the change in setback. T
Last edited by beertestr; 03-31-2009 at 02:15 PM.
Mike http://kds-performance.com 94 Silverado Z71 SCLB 4.8L LR4 Daily Driver 93 GMC Sierra 2WD LS V8 Swap dun, run, rusted, stripped & junked 1979 Caprice Coupe - LS Swapped - 11.76@115.8
) and I know I posted some pics with dimensions. IF I can find my drawings, I'll repost.
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