Power steering would solve your exhaust clearance issue. Then you can use rams horn manifolds. You will need 2 which exit straight down.
Power steering is an awesome upgrade too.
I can't tell from you pic if you have room for the 265 engine manifolds or not. Looks pretty tight.
Some have rigged bracketry to allow the steering box to the left for more clearance. I don't like that option personally.
Carl
