[Fitz]

i would like to get rid of the 4 banger and drop a 302 to give it a little snort behind the wheel.

 

[imported_Bob]

they were a option in the next year 75, it seems they had to move the radiator forward a couple of inches, but everything is available, oh and the the 74's made in Mexico had the 302. you might need a parts car, watch ebay for someone parting one out.

 

[imported_Corey]

You don't need a conversion kit, just change the motor mounts and other parts that the V8 Mustang II had.

 

[bour]

This site:http://www.fordpinto.com/index.php?topic=1568.0 has step by step detailed instructions for changing out a 4 banger to a V8 in a Pinto which is the same basic frame as a Mustang II so this should give U all the info [with pics!] that U will need to see if U are up to the task of doing the swap.
Good Luck!