Re: Questions on what is supposedly a Can-Am ZL-1 block offered for sale.
The September 1972 Hot Rod has a good tech article on the block which is referred to as the "Can-Am" block: no sleeves or fuel pump boss.
There were larger-bore aluminum blocks with sleeves were developed after the ZL-1. However the article mentions one reason for doing "Can-Am" version was the siamesed sleeved cylinders were causing blocks to crack in that area. Doesn't sound stronger to me.
Having done one ZL-1 project be aware that the aluminum motor will present some technical hurdles, particularly if you desire it to appear absolutely OE.
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