1966 pltmouth barracuda radiator for 318

Pretty much ANY 22" Mopar radiator will bolt in. There are two basic configurations: 1964-1969 which has a drivers side lower hose, and 1970-up which has a passenger side lower hose. The later radiators will swap into early cars if you use the 70-up water pump. If you are using a 70-up engine, with the timing marks cast into the timing cover this may be a desirable setup. The early water pump puts the lower hose directly over the later timing marks, making them hard to see.