buy or build 727?

i have a 727 core, and am planning on using it in a 700-750hp application. what all would need to be done to prep it for that power level? planning on footbrake, and manual valve body.
also, would it be cheaper to buy an aftermarket?
Thanks in advance

build it my .

if you buy one from Cope, you get a free freshen up. thats got to be worth something.

build if you can

i have a b&m overhaul kit from a previous project. what parts(if any) would you say will be ok for this build? and are there any factory internal parts not included in the overhaul kits that would need replacing?
thanks

i had someone build my trans for me, but i checked out what parts Cope fitted to his performance transmissions & shopped around & bought the parts myself. after i had my trans rebuilt a second time because my trans man has problems reading a micrometer(0.060 clearence reqd, not 0.006) it would have been cheaper for me to have bought a complete trans ready to go.

i build my own trannies for the most part but when i started gettin in the 7to 800 hp range i had john cope build me one,the peice of mind makes it worth the money.

I also build my own tranny's. Ron

I am going through this dilemma myself. We've always built the others...

I built my own, but it cost almost the same as if I bought one from Cope (I got most of the parts from him anyhow.)
I basically built my transmission about the same as the 727-6 ProRace II Manual Reverse trans with the ultimate sprag and thick lug pump, steel front gear set, billet drums (front and rear), lightened sun shell, etc. This trans from Cope with the ultimate sprag and pump gear is $3,295 (not sure what rear drum and sun shell it has?) I may have saved a few bucks building my own, but Cope offers a free refresh.
If you do plan to build your own, you may need to have a selection of various thickness pump and thrust washers, snap rings, and I think I even used a thicker kolene steel in a clutch pack to set the clearances. You will also want a rear vent kit, several 1/8" NPT plugs and a 1/8" NPT tap. Also, plan on getting a few thread repair kits.

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i have a b&m overhaul kit from a previous project. what parts(if any) would you say will be ok for this build? and are there any factory internal parts not included in the overhaul kits that would need replacing?
thanks

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Once your in the 600+ HP range it is time to buy the good parts in trans Call one of the better trans builder like John Cope, ATI, Turbo Action on the east coast or Dave Smith at Pro Trans on the west coast(my personel choice ) and have them build you a trans, using your core or you can save your core for later, once you have it use it and do the maintenanace they recommend as far as band adjustment, fluid and filter changes and so on. Also ask them for the inspection specs for tearting it down and inspecting it down the road so yuo will know when it is time to replace the clutches and so on I have built my own trans. in the past and ended up finding out that most of the general aotomotive rebuld kits don't have all the proper thickness thrust washers, torrington bearings, good race clutches and so on. Once the trans is set up properly you can buy the clutches, fibers and steels, from the trans company you bought from to start with and do the maintenance yourself One of the critical things not mentioned so far is you need in a race 727 making enough HP to break drivetrain parts is a good, explosion proof front drum, steel or alumimun