1990 4.3 fit in a 1999 blazer
 

Im looking at buying a 1990 c1500 with the 4.3. I'm just gonna use the trans and axle for my truck. My mom has a blazer with a badly knocking 4.3 vortec. My question is would the older engine work in her blazer? I know we'd have to use the 99 intake and possibly heads. Would anything else need to be changed? She's not looking to put alot of money into it as she is trying to sell it. Any advice would be greatly appreciated.

Re: 1990 4.3 fit in a 1999 blazer
 

No, It will not fit is the easy answer, Installing a Crank Sensor on a '90 4.3L isn't feasible.

Re: 1990 4.3 fit in a 1999 blazer
 

I hate to disagree with the above poster so I won't yeah it wont work two different generations of electronics. On the 4.3 you need to come forward on the year models not backwards. 1999-basicly- 2007 will work with minor sensor changes. When you start going backwards the 98 back motors carry different stuff altogether. Jim