The 4.0 Intech inline six was found in the 1998-2002 AU Falcon and other Ford Australia models. The "Intech" designation was only assigned to the 1998-2002 model years; the 4.0L SOHC engine found in the EB to EL models were not. To determine if it is a 4.0 Intech is the valve cover will be embossed with "4.0 Intech" and the engine will have a cast aluminum oil sump.
The 4.0 Intech is a transitional engine. It uses the same crank bearings and connecting rods as the next generation Barra 4.0 engine, and the oil sump has cross bolts into the main caps. The rear sump from the early Barra engine can be used on the Intech.
To install the 4.0 engine into your 1965 Ford Ranchero you will need to purchase a J3 chip to go into the ECU to disable any engine immobilisers. TI Performance in Australia sell the J3 chip,
https://www.tiperformance.com.au . The 4.0 Intech engine has similar dimensions around the motor mount area to the Barra 4.0, so you maybe able to use the Tuff Mount Kit for the 1964-70 Mustang,
https://tuffmounts.com.au/product/e...s-for-barra-conversion-in-64-69-ford-mustang/
I've attached pictures of the 4.0 Intech I have so you can see if the one you are looking at is similar.