427 aluminum block

[DW31S]

I know who does MacNeish's aluminum work and that fellow has fixed stuff for me. I'm friends with Jerry MacNeish and wouldn't feel right "backdooring" him by posting that contact info. here. He makes a living doing what I do for a hobby, and I'll be happy to ask him to post here so you can speak directly to him regarding your repair. I couldn't tell you if there is some type of "contract" between himself and the "aluminum wizard" (the guy really is that good). I'm pretty sure you can contact him here or at his business which does have a website.