how crazy can you make a stock intake??

[LX XLR8R]

im pondering the idea of making a total sleeper over the winter..
i want to build a 347 using a stock intake and get alot from it..i have full acess to a machine shop...i was ganna cut one in 1/2 gut it out and open everything up to accept a 70mmTB(i have one that looks stock)..the lower i was ganna get a system max 1 and port it out..
after i welded the intake back 2gether i was ganna polish the entire thing so people wont see the weld and cut..
i am going to use pretty much all my other stuff i have(heads<paint them black>, cam<will prolly get a smalller on>, exhaust) and it will be in the notch..i am also pluming in my zex kit also on the dl..
so how fast gave people went with a stock intake on motor???i figure the 347 just wants to breath so i was ganna open this thing up to the max

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1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
AIM=onesillynotch