Whats the diff in 6.2\'s? My fathers 84 Sub has a 6.2 in it, the crank broke. I located anouther 6.2 cheep out of an 83 pick up, the 84 has an open intake and the 83 has an egr valve in the middle of the intake air inlet. Whats the diff between the two engines? Which is better? Should I just pull the crank from the 83 and stick it into the 84? Any info would be nice, thanks.