727 or Powerglide?

[sgt. slaughter]

I am trying to decide what trans to put in my 72 Valiant. It has Super Stock springs under the frame rails, with sliders and ladder bars (typical Super Stocker setup) and mini tubs (10.5 in slicks). 8 3/4 w/4.56

I am building up a stroker smallblock with a blower.

I am thinking that a Powerglide might work better with the flat torque curve. The 727 is a lot heavier with more parasitic loss, but is a 3 speed.

Anyone have any experience with this combo, or any insight?

 

[Mrmopartech]

If you build the TF with the right components it will out perform the glide.Light weight parts and with a bunch of tricks to the drums,it will last a long time.A glide will work too,but for how long,after all,it was intended for a straight 6 and small V8 with less than 200HP.Mrmopartech

 

[68gts340]

the biggest issue with a power glide is the weight of the car ...3000 lbs is considered max around here but the lighter the better, any thing over that weight a 3 speed auto is faster in the 1/4 mile, so if you are running a 2900 lb car it will only a slight improvement..

 

[Duster346]

I am trying to decide what trans to put in my 72 Valiant. It has Super Stock springs under the frame rails, with sliders and ladder bars (typical Super Stocker setup) and mini tubs (10.5 in slicks). 8 3/4 w/4.56

I am building up a stroker smallblock with a blower.

I am thinking that a Powerglide might work better with the flat torque curve. The 727 is a lot heavier with more parasitic loss, but is a 3 speed.

Anyone have any experience with this combo, or any insight?

How much HP is the blown small block going to make? You need a fairly light vehicle, and quite a bit of power to use a powerglide. The main advantage with the powerglide would be the numerically lower first gear ratio. This helps the higher horsepower cars from spinning the tires off the starting line.

I'd use a 727 with good parts personally, unless you're making over 1000hp with 25 psi of boost off of the starting line.