Would moving the engine forward help or make it worse? I’ll be hanging the engine and tranny on new tubular crossmembers which gives some flexability.
If i cant use anything but stock 1-3/8 by 2” exhaust manifolds, i guess it will be time to consider the 500 series box. I dont like the wandering shaft and forward mount box, but its a tradoff to he able to use better exhaust headers/manifolds.