8.75 3.91 center section 741 case, sure grip

I have a nice center section that I will not be using. 741 case 3.91 gear set sure grip. Worked fine when removed. Asking $450 plus shipping. Shipping will be pricey as it is heavy. I'm guessing about 75lbs. I was going to remove the sure grip unit to put in my 3.55 center section but don't want to pull apart a good working unit. I will consider a trade for a 3.55 sure grip unit in good working condition. Located in s.e. Michigan 48191. Thanks. This has the large yoke.

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