Ok hears the deal, I have a 93 F-250 with a blown 5.8 liter and automatic
I have a wrecked 86 F-150 with a 300 and a standard tranny in it. I pulled the 300 today and can see that it will bolt up to my F-250 tranny and the flywheel bolts line up But theres a weight on the 5.8 flywheel so I am assuming it is an externaly balanced engine. Is the 300 internaly balnced or external?

Can I remove the weight from the 5.8 flywheel and use it?

Budget is extrememly tight and I really need to get it running as I should be getting called back to work in the next two weeks or so.

 

Ok problem solved.
Step one
mount the 300 flywheel in the lathe and spin it up. I figure I had it going 2000 rpm's and no vibration, it did take it a while to stop though.

Step two
Put the 5.8 flexplate in the lathe, nasty vibration at less than 1000 rpms

Step 3
remove the weight from the flex plate. put it back in the lathe.
3600 rpms an as smooth as a swiss watch. Well maybe not a swiss watch but as smooth as a timex which is close enough in my book

 

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