Hi six gun . . .
Are you familiar with the draglist site?
DragListSearch A few searches there on 'lashure' in the late '70s lead me to believe that the opel was probably powered by a chevy bent8. Anything unusual would certainly rate more of a description then an 'unknown cubic in Chevrolet with an automatic transmission.'
It would appear that Curt is still active in NHRA division one as a chassis inspector:
NHRA Div1the page includes contact info.
regards,
stock49