Wasn't there a '69 for sale within the past year or so that was advertised as a 'Real Yenko' but was really a 'converted by' car? . I believe the seller had separate Yenko Parts dept. receipts for the motor stuff and a Service work order for the install? . I think it had one of the blocks w/ the Logo (mid 70's?), not the earlier 'YENKO word' blocks? .
~ Pete