Member "Island Time" bought the aluminum for his sbc.
I bought the cast iron. (times two)
The castings were crap and I had to spend a week of evenings making them flat.
The aluminum ones were better, I am told.
Beware of dennis moore customer service.
He gives "rough" shipping dates and doesn't always ship all items promised.
He failed to ship the riser bolts with my kits.
When I emailed him to tell him that I didn't get them he told me that I must be a "mechnical novice" since I emailed him instead of going down to the hardware store and buying some more of what I had already paid for.
I would buy them from someone else next time just because he turned into such a pr*ck when I had a question.
Island Time had better luck with dennis.