I found some old blueprints from my old B motor A body swap manual from years (about 17 to be exact!! ughhh! ) back, It used an insualtor and 2 "L" brackets. They worked really well on a 451" B motored Duster that went high 6's in the 1/8th, roughly a 10.90 caliber car.

My scanner isn't large enough to put the whole print on it and the original Cad files are "somewhere"......if you like I can scan them on Monday and send them to you.

L bracket detail