Tim -

Something occurs to me. In the early sixties Chrysler produced some aluminum slant six blocks. No kidding. I once owned one but I wound up selling it prior to one of my many moves.

Finding one now would be a big challenge, but who knows? Some old clod like me may have picked up one years ago and it may still be over there under a pile of other interesting stuff.

As you would guess, they are (were?) a bunch lighter than their cast iron brothers. They (Chrysler) also made some stock aluminum one-barrel intakes. I actually still have one of those that I converted to accept a two barrel from a 318. (Sorry, it's not for sale).

I just thought I'd pass that by you. If you are interested you might try advertising and/or keeping your eyes open when you are wrecking yard scrounging. They're not too hard to identify.

Jim