Hey, im just building a 1974 504 for hill climbs and rallys at my local club.
Im just in the process of sorting the motor, clutch and brakes etc.
What cylinder head is better for tuning, the square or round port?
My xn1 has a square port head. goes really well.
Was looking at a round port head thinking i could do new intake and quad carb setup?
or should i keep the square port and just get a new carb , cam, push rods and build some extractors?