Aftermarket Aluminum FE Blocks

[Woodz428]

I understand the reasoning for the question and think the comparisons to the Mod motor or Late model Chebby stock engines are irrelevant to that. I think both of those engines underwent substantial high mileage testing, because the mfg's have to warranty their stuff. Something that is probably unlikely with any aftermarket Aluminum block, most I've seen only warranty against mfg. defects. If for no other reason than the number of variables involved. Once you assemble it and add your parts, they are pretty much in the clear, it could be attributed to any number of things other than just the block. I could expound on the amount of miles some of the bike engines that I serviced over the years achieved, but that is hardly applicable. I feel the same way about the comparison to new factory engines.
I'm a big FE fan, but have avoided any aluminum block because of shortage of longterm info. For me, the little extra weight isn't as much of a concern.