[jeff s]

Back in 2002 when I built my Ultima GTR, I wanted EFI. It was more money for me to EFI and build and aluminum head Gen1 SBC that to get a complete aluminum LS1/LS6, with a cam change and cnc'd heads I had 500hp.
I bought 2 LS1 long blocks for $800 ea, I had a 5.3 iron block with alum heads given to me, the garage that installed a new engine into a Tahoe found none of the core people would give them anything for it. I bored that one to 5.7 and it'll end up with turbo's on it soon.
A LS2 aluminum block is $995. I've got twin turbos on mine.
Flat heads haven't gone any where, there's still people into em, and lots of new parts available for em as well.
When was the last gen 1 or 2 put in a production car? 10 years ago