Need Help Determining what engine I have? - 88 Comanche

[88ComancheGA]

Hello. I ran my carfax on the VIN. Says its a 1988 as I assumed. But I think my engine was swapped out somewhere around 2006 as the mileage has moved around over the years. I am trying to determine if this is the original engine for this truck? As well as making sure i order right parts as I put it back together. 

Here is what I know. 

The Head reads 2686 with a large 89 on the top in the middle 

The block reads 53005535 on driver side front. 

The block reads 6-10-89 on driver side near firewall. 

So all signs are leading to an 89 engine in a 88 Comanche?

The tag on the passenger side near distributor is almost unreadable, as best i can make out is only 6MX2I

Any help would be greatly appreciated. Thank you. 

 

[Pete M]

drop your VIN into the registry and one of the dealership guys will be able to get you some details.  

 

https://comancheclub.com/forum/28-comanche-registry/

[Rockfrog]

When ordering parts, 87-90 are identical as far as the motor goes, there little to no difference on all the other parts, and those that differ are factory upgraded/superceded parts (thebdistributor is one, the 89-90 having less leaking issues than the 87-88). 

 

2686 is the coreect head casting used from 87-90

53005535 is the correct Block casting used from 87-90 

 

It is possible the motor was replaced with a newer motor in better condition. But other than a newer build date than the original, it is identical in every way to the 88 motor.