78 Aspen 904 tranny into 69 dart spedo cable issue

I believe I have it figured out with the help you guys offered. I no longer have the original 225 or tranny. I'm assuming it was a 904 tranny with a /6 bell housing.

Anyway, I've ordered off of ebay the correct cast spedo gear housing with the threaded end for the spedo cable and a 31 tooth gear for use with P235/60R/15 tires. The chart I found calls out for a 32 tooth but couldn't find one.

Car is in the muffler shop getting dual X pipe and flowmasters 40's with tailpipes out the back, then off to the alignment shop. Should be ready for the road after that! It's been 3 years getting to this point due to other projects including a rock crawler 89 YJ.

Thanks again
Scott :cheers: