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Engine swap

Tiny
MATTE1114
  • MEMBER
  • 1991 CHEVROLET S-10
  • 10,000 MILES
I have a 4.3 tbfi in my 91 sonoma and im wanting to swap it with a 4.3 fi out of a 94 blazer. What changes do I need to make to make it fit and work properly?Any cuts to the firewall?
Friday, February 24th, 2012 AT 9:12 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,911 POSTS
We only recommend direct fit parts
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Friday, February 24th, 2012 AT 9:16 PM
Tiny
MATTE1114
  • MEMBER
  • 4 POSTS
Ok but without a direct fit part, not saying you recommend it, how would one make it fit?
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Friday, February 24th, 2012 AT 9:23 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Direct fit would bolt right in place
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Friday, February 24th, 2012 AT 9:31 PM
Tiny
MATTE1114
  • MEMBER
  • 4 POSTS
I was given the 4.3 fi for free, workin on a limited budget at the moment but not limited time. Aside from the firewall, will most the other oarts still fit in place?Or will I need to do alot of converting?
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Friday, February 24th, 2012 AT 9:35 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,911 POSTS
Chances are you will be doing a lot of changing. When you change from one year to another, it is usually a headach. That is why we recommend direct fit parts.
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Friday, February 24th, 2012 AT 9:40 PM
Tiny
MATTE1114
  • MEMBER
  • 4 POSTS
Alright, one last question. Will the transmission match up with the rear of the new block?I looked into the motor and it said that 91 to 94 would be ok, but my main question is going from tbfi to straight fi if itll make a huge change.
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Friday, February 24th, 2012 AT 9:45 PM

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