I can't tell you for SURE but I can say that I have a 350 in my 37 and I use a set of the block hugger's. I have a StangII front end under it but not a professional unit. One from an actual StangII.
With the 2nd series I would think you have a lot more room than I have. My friend once ran a 427 in a 55 put not sure about headers.


1937 Chevy Pickup
In the Gallery
1952 Chevy Panel
In the Gallery
More photos
1950 Chevy Coupe
Pictures!

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile