d50/ mighty max firewall tubbing

i need to kno how hard it would be to tub the fire wall for 20's. im gonna be doin my front bags within the next 8-9 mons and i might wanna run 20s up front one day and i wanted to tub the firewall since ill have the frontend off. so if anyone can tell me or even better show some pics if there are any and btw im only framing my d50 so i wont need to go as low like for a b/d.

anyone???
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Suicidedoors.com sells some nice firewall tubs, got some for mine, they are big as hell, just gotta cut them to fit.

i got my tubs from suicidedoors.com as well they are def. worth buying...