68 Barracuda 225 to 440 to 426
On a recent Hemi /A body build I found that the newer offset master cylinder adapters are only off set 3/4". The one on my silver Duster, purchased years ago from Mancini has a 1" offset. The 20+ year old offset that was on the Flash is 1" offset also. The extra 1/4" is almost required to be able to remove the #7 plug. I have been unable to find 1" offsets and might have to make a few incorporating another small modification to my version.
BTW...I like your sway bar bracket / lower core support brackets.