im almost ready to finish my engine, emphasis on "almost", and have come to realise that my RB upper manifold for a 85 13B will not fit my TII lower manifold. the bolt pattern is different. now, does the TII and NA series 4/5 UPM have the same bolt pattern or did it differ between NAs and TIIs?? Or basically, will the RB UPM made for a 86-91 NA fit the TII LIM bolt pattern?

or can someone point me to where i can get an adapter plate for the early UPM to the late LIM, if there is one?

Thanks

 

ask judge ito he will know. i can pm you his # if you need it

 

i know 84-85 is different from 86-88 na, and then 89-91na is different again. the turbos are different from the na's. the 86-88 rb one might be really close....



mike