One step at a time maybe? :D
Some of us do it that way.
I got forced into doing it all at once because half way through putting my 5.9 together, my 904 trans started bitching.
A small mod to one of the converter bolt holes in the flex plate and it bolts right up as far as the motor end.
You will also need the larger driveshaft yoke of the A500, then you use the conversion U joint and just have your current driveshaft shortened.
The cooler lines are 3/8 instead of the 904's 5/16 and you will need the 80 inch speedo cable so it can reach the new length.
Speedo assembly on the A500 needs to be swapped from the electronic sensor to the gear type.
Then there's the decision on how to control OD and lockup (automatic or manually switched)
I did all the fab work, and I have somewhere around 500 into the entire swap, and that includes the stuff for fully automatic shifting.
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