guys i have not got this setup done yet and i have not tryed to put the vannete balljoint in the lower control arm i merely pointed out waht you need as i was told this info i am still gathering parts for it

The HP of your motor is not such an issue in braking, its the weight of the car ,which being a 1000 is very low, you only need the brakes to be as big as will do the job any bigger is just going to add unnecessarily to your unsprung weight which will be to the detriment of your cars handling and performance.

You say your "not worried about weight atm as i can make other things lighter"

In the front the the unsprung mass is only the hubs the brakes the wheels and tyres, there is not a lot of "other things" to make lighter.

My most recent B10 racer(recently sold)went 820kg. with me in it,fullcage,and everything gutted that was legal,A15,toyota gearbox,1200 ute diff etc.So if your looking at MX5 i rekon you'd be looking at about 900kg.
That said unless your going thru the firewall and going Sports Sedan regs.Wait you are going s/sedan anyway cause your not keeping the original manufacturers block type in the car.Back to it now..unless you go the firewall and get weight of the front the thing won't handle,the biggest problem with all the B10's is the chassis flexing from the fire wall forward and the pissey little front towers where your top wishbone bolts.The movement in these areas is massive and adding weight is a recipy for disaster.These areas can be modified to a degree but won't achieve much by way of stiffness but will add more weight.If you go full blown s/sedan regs you can fabricate towers and poke some adj.struts in place of the transverse leaf,but now you have a trailer only car which you will not get registered for road use(it is possible i suppose,but i think a new house would be cheaper)i do regular crack tests on the standard uprights/stubs with no problems to date on either car.
Hope all my personel experiances help
Cheers
Bert

hey guys thanks for all ur input and info i suppose i should tell al little about the car its getting full seem welded half cage turboed mx5 motor gtr brakes skyline diff carbon firber bonet boot and am looking into a carbon fiber front leaf spring to remove some of the weight there and also any thing else i can loose and make it into carbon to loose some weight but i guess i will just go with the originall stub axel assembly and see what happens thanks again guys

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This question has surfaced many times. Well, they say a picture is worth a thousand words...Have a look at this video if you be bothered to download a 24MB file.

http://home.exetel.com.au/pug/OPGP_5.mpg