Don't move the motor back into the firewall. I did that years ago when I did my first SBC into a CJ5. It sucked working on the back of the engine, getting to bellhousing bolts, changing gas pedal location, heater core & heat ducts, etc. If you want more uptravel in the front and are planning to redo your links, now is the time to stretch it forward.
GLFWDA member since 1979.
Member Southern Michigan Rock Crawlers.