[JBo]

you might want to try the "chambered mufflers "; round; that have been explored on this site. Wheel houses on csx3000 replicas; dimensionally correct; may not accept mufflers, AK's barley did and they had an extra 2" of clearance per side.Original 427's had under car mufflers or in the case of my ex had GT350 R model systems that exited in front of rear wheels as you state.