I have done some work.UMI rear suspension,new chip,pulleys,new valvesprings and 1.6 roller rockers,This is a 350 car with 3.27 gears.It runs 9.04 to 9.06 now. It ran 9.60 before this.

 

Drag radials on stock wheels and a looser converter should be worth near a half second.

 

DR's,headers/exhaust,gut the stock air boxes,and an adjustable fuel pressure regulator.

 

I have weld wheels and slicks,I have shorty hedders not on car yet,and NOS plate kit to install,but want 8's on motor.I have ordered the lower control arm relocation kit to install to help 60 foot times.

 

In that case install the headers and a Precision Industries Vigilante 2800rpm stall torque converter.

 

I would say gears, but gears for a 9 bolt are pricey. If you do go with gears, go 3.77's since you probably won't notice any real difference going with 3.45's.

Slap a Holley Stealthram on there, about $500 and comes with new fuel rails (you just need to clearance the underside of the hood a tad if you still have the stock hood).
You should see a nice improvement when you install the headers.

 

Marc's right!

2800-3000rpm Yank or Vigilante torque converter

My advice..no matter what vehicle is: Drag radials+Converter+100 shot=

 

headers and cam. converter and gears.

 

What is your 60ft time?
Do you have traction problems?

Get a set of lower control relocation brackets(lcarbs) and box your lower control arms too.
Inbolt your front sway bar for better weight transfer.


If you want an extra tenth of a second, put a switch to disconnect your alternator. I did this and it netted me a tenth.