Steve since when is Cadillac making fish pumps? Just kidding! I thought my Ford 460 was a behemoth, but that 500cc bad boy is huge! the width alone wouldn't fit at normal mounting height in my truck! Your going to need that extra steel to support it!
My aunt (who is in her 80's) has an early 60's Mercedes Benz 4 door sedan she wants me to take and restore. She's had it since the 70's. It was made custom for a guy in California, on a checker cab frame according to her. Every time I read this thread I think about it!