My friend up in Norway has an SBC aluminum engine block with casting number 1013439.
He bought it new at the Daytona swap meet some years ago and was told it was a Nascar block by the seller.
Nascar doesn't allow aluminum blocks. The only info I have for aluminum small blocks is an old GM Performance catalog--Part #366300 302/327/350 CID aluminum bare block w/4" bore iron sleeves,splayed nodular 4 bolt caps on intermediate mains for 2.45" main journal crankshaft. Casting # 366299
BL
