My 51 came stock with 3.90's. And a three on the tree and a flathead 6. Must of been a terror in the dragstrip.

1951 and 1952 Plymouths were heavily involved in the 51 and 52 Nascar seasons, pretty much bone stock. Johnny Mantz won the inaugural Southern 500 in 1950 driving a stock 50 Plymouth. 500 miles of WOT.

I think your friend is just afraid to drive his car.