[Gearworks]

it might help. you can even unplug the distributor if you dont raise the rpm above an idle.
the hissing under the dash is the rubber diaphragm in the airbox controller (the floor/defrost lever) unfortunately theres NO easy way to fix that, and i seriously DOUBT thats youre vaccuum leak.

As far as the power you MAY be around 400hp. remember these birds are HEAVY! usually around 4100 pounds in full trim! I had to damn near gut mine to get it to 3600!!!

As far as times its VERY hard to tell. That depends on youre prowess with the car. you MAY be able to pull off a low 11 with it.

WEIGHT is youre enemy! lose whatever you can. Ie. drop out the bumper liners (makes it neccessary to make youre own mounting brackets) but you'll lose 100 pounds right off the bat!

I gutted the entire air box and all related controls that was 150 pounds including the A/C pump. Power seats are about 100 pounds EACH... so you can see where they add up.