I stuck a set on temporary to use while my 205 CNC TFS were out. They ran the same, made 1000 or so with a T4 midframe turbo. After maybe 100 or 150 runs they started eating up valve seats, but this was at 25 psi boost and 60 psi hot side pressure and 7500 RPM. I think they are good head for a budget build.
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89 LX. 363, single turbo S482 FMW, Super Vic EFI, Fox Lake Stage III heads, solid roller, glide. Holley HP EFI. (combo varies)