The trans vac modulator line comes off the throttle body before the rotor pack. So it won't see boost. If you use the 99 throttle body just drill a hole in the same location as your second vac fitting on your stock throttle body and put a barb on it.

Oh ok great :) I was thinking vacuum would be ...

the modual will be fine with boost. I had a 4T60-E in my Turbo 3.4L LQ1 monte and no problem with it seeing boost. I will say tho it does like a OEM Factory Vac modulator.. had issues when the trans was built and a "Red Strip" aftermarket one was put in. It actually shifted very well with the boost ...

I'm not swapping the trans until I blow it up though so I don't think wiring will be an issue at this point. Hopefully not anyways. Getting ready to go tear her apart right now! Taking the heads to get port/polish before anything.

Thanks for the replys. I just am unsure about the tranny vacuum because the 98+ have electronic controlled tranny so there are no provisions for it on the newer top end.

I know I should swap the motor and get a trans but I am impatient and don't have the money for everything so I'll take what I can ...

Scouring craigslist last night I came across a 2001 100k L67 complete without trans for $200. No brainer gonna go buy it in a few hours.

My question is, will doing a top swap cause an issue for the vacuum controlled trans that is in the car (1997)? If it will, how do I get around it?

If you ...

I know you found a big rust hole, but in that vintage bonneville, leaks are super common through the tail lights. They will fill the trunk with water just like you described. Might want to have a peak when you get a chance.

Thanks I will give her a once over. I think the sunroof drain is leaking ...

I won't speak for everyone but I love the look that your going for including the wheels. Welcome to the club.

I like big wheels, not so much that the car has to be lifted though. I'm thinking 22s with a small drop and stiffer springs. Just not sure if they will tuck under the fender wells. If it ...

Got my first Bonneville, it's a 1997 SSE with about 225k miles. Payed $1,500 for it, seemed like an OK deal. First day I had it I filled the tank and just drove around until it was on E. This car is really solid, rides smooth, nice low end torque and exhaust note.

http://i62.tinypic.com/dbi0pv ...