Finally got around to making up alternator and air con compressor mounts. I stumbled accross a solid works model of the LS3, so used some measurements from that and set up a couple of 2D AutoCAD drawings. The air con compressor mount was pretty straight forward, but the alternator took quite a few revisions to get right. I traced out the shape and holes onto craftwood at first then once happy everything fits, I had a local aluminium fabricator cut the parts out of 16mm plate using a CNC router. Really happy with the result. Not as flashy as the ICT tensioner I used, but it's functional and looks neat enough. Hopefully all the pulleys line up OK. Aiming for a first start in a few weeks.
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Used the old faithful lathe to turn up a few idler pulley bushes.
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The finished setup:
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