So.... Update...
Long story short. as of 9pm on April 9th, 2011. The first Successful 75 intake manifold on a 72 is complete.
The only two things left to do is to adjust the throttle, we left it a little loose cause we didn't want to over stretch it. and put a vacuum line on for Cruise Control.
The install literally probably only took, 10 hours...? but it took from 7pm on friday to 9pm on saturday cause there's this pesky little thing called sleep, plus there was no how to, or parts list, so we had to custom fab a lot of it.
Okay, when i say we, from no on, i usually mean White Knight, that guy is a really good welder/metal worker.
Anyway... major issues we had.
The fucking intake... holy shit i have half a short ram now! (temporary because we were exhausted.
Relocating the battery... that's a must here. I have mine in my trunk now, and i need to get a compasitor, or a smaller battery for up in the engine bay. mostly because instead of starting on the first crank, or the second, it sometimes takes 3 to 4 cranks to get enough draw off the battery (we only had 4 gauge cable to use.)
Not knowing the parts list.... that was our biggest set back. i bet we went to about 4 or 5 different stores, (most of them two or three times) to get stuff like vacum lines and new bolts for the bigger manifold
After it was all said and done, i love it. It just sounds.... mean. straight mean. I know it's not a v8, and it doesn't sound like one and it never will. but it resembles one. or at the very least it sounds like a much bigger v6. It literally makes me want to do an exhaust system next just to make everything sound even. the stock exhaust doesn't do this justice!
I have the other intake choices we were trying out, but this is the finished product... kind of. :P