Ram's horns create steering box problems- - - -they don't help with the conversion. The manifolds that offer steering box clearance benefits are the ones for 55-57 passenger car 265 engines with the driver's side exhaust pipe flange between the front pair of cylinders. They're on Ebay pretty regularly at bargain prices. Rams' horns offer better breathing at high RPM, but it's a moot point for street-driven engines unless you just love paying speeding tickets.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!