Yes, this a carburated 3F. My rusty 71 FJ40 cruiser came with the original F which we subsequently removed and swapped in the 3F. We tried to use the headers that were on the F as seen below. I think these are the MAF aftermarket headers but regardless, they are not working for the 3F. We have tried one, two gaskets, etc. They must be warped..
Looking for another set that will work?
Thanks...PM or email
chipbartlett@gmail.com 
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