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.

All these guys mentioned do a great job. If you want to save bucks do it yourself. assuming you have a good core there is no reason that you would need to buy $3000 in parts. I've built reliable non transbrake 727 for your HP level for about $1000 including front drum and valve body. A pro build will give you upgrades that I don't use as well as a guarantee in most cases. The choice is yours.
Doug

at 700+ HP you really need the steel spline front gear and billit front drum. These two parts alone cost almost $1,000. I think in a simular post I listed the trans components and the actual costs, and they add up pretty quick when doing a race trans. If your car is fairly light or under 600 HP then you may not need the front gear or drum, but the durm is a good safety upgrade.

I priced it out and opted to buy one. I went with Hughes (not as popular as the board sponsors, but they're local to me). Runs great!

if you have any dought as to your level of skill at that power level have it built, of course i recomend John Cope at CRT.

every part/piece gets his personal attention before assembly.from the bead blasted case(one stripped bolt hole and its rejected) to each separate bolt and nut(plated in the color gold)


the free freshen up is super nice too

did i mention the customer service after the fact.

ok i will shut up now

I like to do things myself, because then you have no one to blame but yourself and I like to learn how to do things. So I say do it yourself.

There are plenty of books out there that show step by step stuff. If you're mechanically inclined you'll have no problem.

And when you do get in a bind, and the books don't have the answer come to moparts or call Rick @ A&A or John @ CRT both are great guys and can supply you with all the parts and tech you will need

I have these two books they have a lot of info in them....