I agree. While the Fentons are good for a cast iron solution, they will not make the torque that a set of full-length tuned headers would make.
Does anyone make a pair of full length tuned headers for the 235??? Or do they have to be custom-built?
I would imagine the Fentons would out-power a split stock exhaust manifold, but the split exhaust would outpower a stock single exhaust. Still, any improvement is good, whatever level you go to.
I wish there were better options for induction though. Even Clifford's intake isn't ideal from a performance standpoint.