Gen I stuff is not going anywhere, just dated for a modern build such as Pro-Touring vehicle where it might be fine for a hot rod. I have donated my LT1 i had built to the "69 Blazer just because I did not want to "date" my '68 Camaro build which will have an LS2 now unless LS7's get real cheap.
It is way to easy to install cam and headers in a LSx and get 400 rwhp which takes some doing to get out of a Gen I.
Mike