need help. i bought a 66 Monterrey with a 351 engine in it. the radiator was not the right one for the car and was shot anyway. found a 66 radiator that fits but for a 390 which originally came with the car. problem is 351 does not have a mount for the expansion tank . now i have a radiator without a expansion tank with no filler! what can i use instead. what else will fit?
They make universal expansion tanks that may fit your car. Mail order catalogs and websites that carry car parts like J.C. Whitney may carry the part you may be looking for your car.
Ebay may also offer an assortment of expansion tanks that may be a close fit for your year and model car.