Does anyone know if a 4.6 gems out of a RR will bolt in place of a 4.0 gems in a disco?

 

Should with little or no problem.

 

What year RR? is it a P-38?

 

I dont have the motor yet, I was just noticing a mid 90's RR 4.6 looked externally almost identical to my 4.0. After I posted that, I found a place that did just that exact conversion, East Coast Rovers. I e-mailed them and asked if it was bolt in. They have an artical on it and sounded like it was

http://www.eastcoastrover.com/116.html
.

 

As long as it has electronic ignition you'll be fine, but if it has a distribitor then you will also need the ECU.