Re: Firebird W68 - My LSX Swap thread.
You may have already gone through this, and I think I remember you saying you were going to use F-body accessories, but you are definitely going to want to use an F-body alternator. The truck alternator will work but does not use the rear mounting bracket like the F-body style. You can get away with the truck alternator on an LS1 block, but as you may have found with an iron block you will be missing 2 mounting points for the front alternator bracket. The center mounting point you will have to do without unless you get very creative, but the upper drivers side bolt hole you will need to drill and tap into the block. For this reason you will need the rear mounting point for the alternator.
I found this thread helpful:
http://ls1tech.com/forums/conversion...ron-block.html
You may have already gone through this, and I think I remember you saying you were going to use F-body accessories, but you are definitely going to want to use an F-body alternator. The truck alternator will work but does not use the rear mounting bracket like the F-body style. You can get away with the truck alternator on an LS1 block, but as you may have found with an iron block you will be missing 2 mounting points for the front alternator bracket. The center mounting point you will have to do without unless you get very creative, but the upper drivers side bolt hole you will need to drill and tap into the block. For this reason you will need the rear mounting point for the alternator.
I found this thread helpful:
http://ls1tech.com/forums/conversion...ron-block.html
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