I have a 2000 F250 with a 7.3. I am doing a 12 valve conversion and it is time to choose the engine. Here is what I know, I want a 12 valve (no computers), I know not to get a 53 block. My questions are what years are the better years for cummins? What are things to look for when looking for a used cummins ie. star gear turned, fuel plate replaced. Thanks for your help.

 

what are your power goals?

 

500hp

 

any 12 valve block will work just fine for you, if you plan on doing a twin charger set up go with the 96-98 block as it already has the secondary oil drain.

 

I have a 96, where is the secondary oil drain? I will be doing twins sometime soon... Thanks.

 

12 valves do not have the secondary oil drain. I have a 97 and twins. I had to add the 2nd oil drain. 24v on the other had have it.

 

yes the late 12v's did have the secondary oil drian encore blocks have it.

 

The 98's have it I guess. Since they used the same block for the 12 & 24 valve

 

Yup 98 12v blocks do have the secondary oil drain. Everything I have seen before that year does not have a 2nd drain though.