After all these years, I just upgraded my 361 2 barrel single exhaust, with a 2 1/2 TTI dual exhaust. Seams to run much better. Could the motor handle a up grade to a 4 barrel. I do have a 5968 casing # manifold that came on the 383's in 64. I also have a aluminum mopar dual plane manifold, I would like to keep it stock looking, if so would I have to go with the 3611 carburetor, or would any afb that was on a 383 in that era work. Would jetting gown be inline. Thanks John Wask.....