is it a 12v manifold ? the 8v ones wont work for you.
You could use a TBI setup like what you find on a chevy v6.
There are guys here in Aus who use the TBI setups of local ford I6 product on their I4 2L pinto motors just by dropping the fuel pressure.
Port fuel injection is better, than any TBI setup, typically by 10-15%.
Depends what you really want from the whole setup
my 84 turbo is still running its factory CFI setup. The biggest problem is the factory ECU and AFM not the CFI TB.
84 626 sedan FE SOHC turbo - Sold, no time to finish
84 626 sedan RF diesel - Sold, no time to work on it.
06 Mazda 6 MPS (Mazdaspeed) new fun car no mods yet
07 Mazda 6 MZR-CD 6sp manual - new DD