Brake upgrade plan: yay or nay?

[helmet]

Car in question is a '77 El Camino.
Already has 10.75" disc brakes all around, but IMO its not enough.
Control arms are all bone stock.
Brakes need to fit behind 15" Cragar Black D's and 17" TTII's.

I plan on using:

This brake kit (http://www.summitracing.com/parts/GLS-DB-1812/)
These calipers (http://www.summitracing.com/parts/WIL-120-10936-RD/)
And these brake pads (http://www.summitracing.com/parts/HWK-HB103F-590/)

Will this fit with the stock control arms and small wheels?

Thanks in advance.

[oestek]

If it were me, I'd install a hydroboost unit. You'd be surprised how well your existing parts can work with enough squeeze.

[Yelcamino]

If it were me, I'd install a hydroboost unit. You'd be surprised how well your existing parts can work with enough squeeze.

...and more aggressive brake pads!

[helmet]

No disrespect meant, but I was kinda asking if those parts I listed are going to work. Besides, I'm 'reserving' the hydroboost upgrade for later down the line.

[gort69]

Fits 7/16 in. studs. This kit requires our tubular upper control arm CNR-42A or AP, a lower ball joint and outer tie rod change. The 12 inch disc conversion will fit 15 inch wheels.

[helmet]

This kit requires our tubular upper control arm CNR-42A or AP, a lower ball joint and outer tie rod change.

Un-frickin-believable, how the hell did I miss that?
Has anyone got a part# for the ball- and tie rods?