Gen 1 12 valve guys come on in, upgrade ??

I'm looking to mostly improve the fuel mileage on my 92 auto equipped 12 valve. Bone stock I'm averaging 21.5. I know a torque converter and injector upgrade would probably be the best mods for improving the mileage but both are rather expensive. So I'm wondering if any of you guys have some tips and/or feedback on things like intake/exhaust mods, and cheap and simple fuel mods like the DennyT fuel pin and 3200 governor spring mods.

Also if you guys know of places or have links for good places to find stuff for these would be great as most everything I've found so far is for the 94 and up trucks.

Thanks

I just put these injectors in my 93 and it really woke it up. Since it is a ramp truck I have never figured the mileage as it will get worse mileage than a stock dually. I think the price was great plus they give you $150 back for your old injectors!

http://www.ebay.com/itm/280865945564?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

a gov spring wont help with mileage. start with a air cleaner improvement, diamond eye makes a reasonable 4" turbo back system which is a improvement. I have a dennyt stage 1 pin in my pump. stage 2 was too much fuel off idle for my 230hp pump. turbo housing.
my 92 gets better mileage than my 07 guessing around 25mpg

1stgen.org and diesel truck resource are good sites for 1st gen trucks.

Thanks guys. I found this site dodgeram.org that has some pretty good tech on it for do it yourself pump mods.

http://dodgeram.org/tech/dsl/more_power/Power_ve.htm

also tst products.com has tech on cummins trucks, and parts

I've also stumbled across dieselbombers.com forum that has some very good tech and info.