Hi everybody! I have finally gotten around to joining this site. After coming here several times I have figured out this one is the best for information. My name is Thomas and I have a ’70 Challenger R/T, originally a 383 4spd car that had a 440 in it when I got the car over 25yrs ago. I have still have the original 4spd (it just needs to be completely gone through) and am keeping my eyes open for a somewhat of a correct date code 383. No plans in the immediate future for a restoration, but one day I may get to it. Right now the car is fun to drive and really don’t have the room right now to tear it apart. Main question right now would be with a 9/69 build date on the car, what date range of engine should I be looking for, or does it really make that big of a difference at this point?