I asked the same question here a few years ago and fitted my exhaust based on the most popular answer. Extractors, 2 inch twin pipes ( I put stainless) no balancer and 2 lucky glass mufflers. I have a 465 four barrel Holley carb. I couldn't be happier with the sound and like all 253's it will do 0-100 in a little under 48 hours but sounds cool while its getting there.