The alloy Oldsie engines are very cool and we've looked at them a few times here before...in short developed for and used in Can-Am racing and/or tested w/ different variations that used Hemi heads, 4 Valve per cyl, DOHC and Twin Turbos too!.
Also, wasn't there a '69 or '70 Cutlass someone posted and we were all looking at here in the past year or so w/ an alloy engine but the thread went sour because they were passing it off as a real W-car and it wasn't...or something else sideways going on?.
~ Pete
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I like real cars best...the REAL real ones!