converting pony motor to electric start

Starting to have "more" problems with the pony motor on an early J D model 70. It has been suggested I get an electric unit from a 720 and replace the pony. This is just a hobby tractor, but dang I like the tractor and really don't want to get rid of it. Any advice. Can it be done efficiently? Is it basically a drop in procedure? Any help is appreciated.
 
Here is a link to the <a href="http://www.yesterdaystractors.com/jd/wwwboard1.html">John Deere Tractors Discussion Board</a>.

As a <a href="https://youtu.be/TtEgyQRzzpg">Model 70 Diesel</a> owner, I would recommend keeping the tractor original with the cranking engine (pony motor) if at all financially possible.
 
Click back to the top and on the left click on discussion forums and then click down until the forum for Jd tractors is shown [list is on the left side of the screen] and then select that forum.
 
I currently have a 730D electric start that I've had since 1975. I have spend at lease $1200 on batteries since I bought it and park it during the winter because of difficulty in starting. So add up the expense of the switch over plus the cost of batteries over the long run and see where you are at. PS, My best friend traded a 3020 gas for a 3020D. Any time he wants to start it in cold weather he has to plug it in for at least for 45 minutes and he bought it for a loader tractor to feed round bales in the winter!! just my 2-cents. john
 
45 minutes? He's lucky. If I want to use the 4020 before noon I better have it plugged in by 6am. If it hasn't had a good four hours you only get about six "wumps" out of it before you know you have a lost cause. Starts and runs like June if she's been plugged in, though.
 

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