Did you beef up the tranny? It was a thing way back then to also swap in a Type 2 tranny from a VW Bus/Kombi/Transporter to handle the increased power after such an engine swap.I put a Porsche Super 90 engine in a ‘67 Bug in HS. Does that count?
And I helped my next door neighbor put a Corvair engine in his Meyers Manx dune buggy.