383 vs 360 in an A 68 Cuda

I have a 440 in my 71 demon no. 7 header tube hits steering linkage no. 6 plug is a nightmare to change have edelbrock heads. what headers are you using?
Not sure who you are asking? My Demons have a 340 w/ cast manifolds and a 408 Small Block with Hooker Super Comp headers. The 408 plug access is very simple and wide open.