Pretty sure syncros are on the way out - would like input

[BB73Challenger]

Hi everyone...

I have a 440 Challenger backed by an 833 (manual of course) 4 speed.
So on the Challenger getting into 1st gear lately has been down right hard.
Also sometimes grinds after driving then putting into reverse.

So here is my question -

I'm on what I would call a budget, because I don't have 2500 - 3000 to drop on a "kit".
Would love a five speed (obviously car is not a numbers match) and with the big block and 3.55 gears is just a little to the point where on the freeway I can't do 65-70 non stop for a long trip.

Should I just rebuild the trans I have to a "stock" spec. ?
Is there something I am missing to "add" a gear to my current set-up? (please don't snicker  )
I have heard mention of an OD manual trans from vans and trucks (I think)

Something else you have seen or done?

Thanks for the input 

[Supercuda]

Yes, it sounds as if old age has caught up with your A-833. Although it has some significant differences, the O/D A-833 will fit your car. Check other threads on here for advice concerning a retrofit. It doesn't have the torque capacity of the iron unit, but is good in a street applcation with a milder engine. Rebuilding the 833 is not too difficult, and would be my choice for a fix. Consider that any O/D trans you find will probably also need repair or rebuildng, and the devil you know becomes friendlier. You might also have a clutch adjustment issue, which will usually affect first and reverse first.

[Chryco Psycho]

 
It sounds more like a clutch problem ,if it is adjusted correctly possibly the clutch is damaged & dragging
the OD 833 is a good choice , it will take the power although later year ODs were weaker than the early ones the front brg reatiner needs to be machined down to 4.80 " & you neeed a belhgousing with the 4.80" hole & a minor adjustment on the 3\4 shift rod to clear the crossmember or possibly lenghten it & it is a bolt in

[Aussie Challenger]

Here is a thread that gives you some A833 & A833OD info. it says /6 but V8 is covered.....
http://www.slantsix.org/articles/4-speeds/ODA833fourspeed1.htm