Big block engine mounts using center and back frame rail holes

[Trackman101]

Hey guys, I am a newbie with a bunch of questions......
I am looking at the No Limit rack and pinion set up for my 71. It uses the front engine mount bolt hole on the frame. So does my big block motor mounts (front and center holes). I have a conflict of space. I willing to move the motor back closer to the firewall without having to clearance the firewall for the valve covers. Are there any mounts out there that accomplish this? I am not concerned with the trans mount or column shifter linkage.

...I've read a bunch but I'm more confused than ever.