Can't really see the exhaust plumbing in the photo. Must be complicated though with a single turbo on a V-8. Looks like a massive exhaust exit, maybe 5"D. Wonder if they route it past the cross-member or just dump it early.
The exhaust goes from 5" to a 3.5" down past the firewall. On my 67 I used 4" to 3.5" and the 3.5" is super tight. Don't know how much bigger you could go on that car?
