Big block engine perches

[tazattitude]

Hey Guys.

Has anyone used the "L" shaped big block brackets (I guess these are C20) and installed them REVERSED. Meaning putting the left on the right side and the right on the left side?
I would plan on mounting the brackets in the REAR 2 holes. I currently have them mounted correctly in the front 2 frame holes on top (along with the correct hole on the crossmember) but it just moves the engine too far forward for my CVF serpentine. I need a total of 11.5" between the head and the radiator. Right now I have 10

I measured and from what I see, I can use the back 2 holes if I can figure out to mount them. Looks like I can reverse them but I'd have to drill 2 new holes in the crossmember (along with notching the top of the frame).
Since the body is off, I measured from the cab mounts directly behind the seat to the inside firewall where the notch is. I have 55". I then measured on the frame from that mount to the edge of the valve cover, and I have 58". Move that back 2" and I should still have clearance.....at least it does look good on paper

I have a '66 GMC Suburban which came with a BB 351e so the firewall is already notched and "appears" to be in the correct place (aprrox 18" up from top of cab mount"

Perches I'm using


My firewall (notice the notch)


I had ordered these, thinking they were BBC mounts, but the picture is incorrect. I guess they are SMC. Hope CJ Pony takes them back

BB installed


Thanks for the help.