I got burned on an old set of 074 aluminum heads long time ago. Young and stupid and wanted aluminum heads too bad...paid $1000 for them said they were ready to go. I had $1800 in them by the time they were "ready to go". :? Could have bought some -2x for around $2000
They were good heads and I used them but that's because I was in too deep to start over.
This was in 1995