Something tells me VW redrives don't weigh 89 pounds!
You can't hand prop a redrive. So start adding the extra weigh of starter , mag and starter mount, starter flywheel , Starter solenoid , large enough battery to do the job of starting, alternator and belt, wiring. Remember it is the firewall forward weight, so that also includes the weight of the engine mount, bolts and prop and bolts.
My 1835 cc, non-electric firewall forward weight of 141 lbs and I tried to same every ounce. The 2232 cc with redrive, firewall forward of 230+ lbs. The 2232 cc engine lasted 87 hrs and the case cracked on the way to OSH. Always had heating problems and he was the person that tried welding larger cooling fins on the heads. Fat fin heads. He then installed a R-912.
There is real life and then --------.