porsche cup et question

[MacBughead]

I just bought a set of porsche cup wheels

2 for front 7x16 ET 50
and
2 for rear: 8x16 ET 70

I may have jumped too quickly on these, but my guess is that an et of 70 is going to give me some headaches....

I am running stock suspention with redrilled hubs, for the front I will use a narrowed front beam with CB dropped spindles and disk brakes .

Did i do good with these wheels or should i sell them again?