Pulling engine on 1450 after 30 years

[GeneW]

Have owned my CC 1450 (built 1976) for about 30 years and in all that time the only thing that disabled the machines was a coil. I've done regular maintenance (points, plugs, air filter, hydraulic filter and oil, engine oil, greasing, front wheel bearings) over the years but that's about it. Engine is shaking a bit and I think it's time to pull the engine and look at the isolation mounts. I have some questions.

I see that there is a mod to add a steel brace to the engine mount frame work. Is this still a recommended mod? Also are there upgraded rubber engine isolation mounts or are the OEM the best?

If I find that the engine mount holes in the oil pan are bad is the best way to go a used cast iron oil pan or is the aluminum pan sufficient?

As long as I'm in there I also plan on replacing the flex disc couplers as a precaution.

Are there any other items I might want to address while the engine is out? I would like to do this right so everything goes another 30 years.

Really admire the CC line. My garage situation is a bit tight so in the Winter I have to climb onto the tractor from the rear. This means I have to stand on the rear fender to get to the seat. I would bet there aren't many new tractors that you can stand on the rear fender and not worry about bending anything. Love the way they were built.

Thanks in advance for any suggestions.

Oh yea, and just in case anybody is wondering I always use the Cub Cadet official HyTran oil changed about every 5 years and the differential is clean as a whistle. Not wanting to start an oil thread on my first post but just making an observation!