Overdrive Options

Did you look at the install at the top of the drivetrain tech page.I installed a a500 with no floor cutting.You still have to remove the cross brace and brace it with a plate.
After watching Mopar to ya install the 2004r and the adapter to install the transmission to the block,i would look at the final price of the install.
In both directions you go you will have to make your own cross member and a new drive shaft,but you can bolt up the a500 and the starter and use the stock tv linkage from a 904 set up and safety switch(if you have it hooked up)
Gdonovan is driving his car with a a500 installed and gave a break down on the cost.
I think your biggest cost will be the transmission,if i was closer i could help you with that but there is a little distance between us.

Good luck with your project.:burnout: