Proposed 68 Satellite disc upgrade. Thoughts please

[68Runner]

Hi
Just bought my Plymouth and am looking into a front drum to disc change.

I've had a look around and I'm thinking of using -
Brembo 4pots (Mitsubishi Evo 7,8,9,10)
Toyota twin turbo 325x30 discs

My question is, is it worth going this route or buying the likes of a Willwood kit.
I reckon i can get it sorted for about £250-300

Cheers for any input