Hi Aron, First thanks for not taking my post the wrong way. I was not trying to sound like a know it all.
Jerry may have a tank for you. If not, which I doubt that he doesn't, you proly can repair the cracks as the seams open up as the plastic dries with age. Just slap some epoxy on the thing & give it a shot to see if that solves the problem of leakage. Check it like you would check a tire,submerge it with air in it...you know that drill.
On the solenoid make sure that you are blocking off the vent securely when you test it. Usually if the solenoid has an issue it will set a DTC. If you had no DTC's, then I would redo the vacuum test on the solenoid again just to make sure.......although I r&r'ed mine just because of age...
There is a trick to testing it though because one of the three ports is an air intake and it has to be closed to get a valid vacuum test result. I wish I could be more specific from memory but I did this stuff back in 05 and I don't remember....senile I guess! If you run into an issue with it, post up and I'll dig out my spares and test one so I can relate the proper procedure to you.
The secondary actuators have passed the vacuum test with flying colors. Just one more thing on them. Redo the test and watch the movement of the arms that they move smoothly as they actuate the linkage to the butterflies and watch all that stuff to see smooth movement, ya'll hear? You're doing okay, when you're dunn you get to be a plenum pull member!
I can't remember your car is a 405 hp car, right? If so you can have your injectors cleaned. The later, after 91, injectors do not fail due to alcohol in the gas. I don't know what the money difference would be cleaning vs new....but it's an option for you.
Tom