hi. names chris. i own a 1994 ranger. 210,000 miles. my grandfather bought it brand new in 94. 4.0 5 speed. last weekend it overheated, i put it in 1st gear and it sounded like a diesel motor chugging to get speed. beyond 2000 rpm it stops knocking. i pulled over and it was bellowing smoke from the heads, so i popped BOTH headgaskets and managed to blow the bottom end in less than 5 mins. so im now carless trying to figure out the best path...