A few months ago, I followed advice like Mark is giving and bought an inexpensive crankcase splitter from Rocky Mountain ATV for $59 and it worked great. I wish I kept better records but the splitter I bought was a recommendation from someone on this site so the credit goes to the site and contributor.
Tusk Crankcase Splitter/Separator
Part# 1177390001

I recently finished my 1 1/2 restoration on my 360 and I ended up with a foot that looks like yours. Unfortunately I fractured my ankle and heel. So my bike is now tucked in the corner covered up til I am able to get back to being completely healed.

Damn, sorry to hear about your misfortune and I thought my 400 was bad. Beautiful bike though!

I didn't see a post from the OP about how this story turned out so just to keep the dream alive I'll add my story. I bought my 1973 RT3 as a basket case a few years ago and over a year ago final got it all back together but it would foul a plug in about 1 mile, maybe 2. it was sucking tranny oil into the engine and therefore getting a 2x or 3x dose of oil. So I have spent the better part of a year putting new seals in it. But here's what you get to enjoy if you persevere. Fast forward to 50 sec if want to skip my dreary introduction. Note I put on my riding boots to do this. And about compression release, you will note the change in sound when I cut the release after it fires up. And it's not blowing any blue smoke so I better double check operation of the auto lube.

Be careful about standing on the footpeg to start it. That puts a lot of strain on the weld for the tab that holds the kickstand. I've seen a couple of them break. It would be better to place a stand or block of wood next to the bike.

I use this for starting my RT3. Harley Davidson compression release # 32076-04 with Alloy Art adapter # CRA-1. Goes in the spare spark plug hole. Needs to be manually actuated before each kick. Works very well, a little better than the original in the front of the cylinder.

But you still need to be careful. The 360 likes to let you know who's boss.