My sb 400 is pushing around 450-475 Hp and has a turbo 400 trans with a shift kit. What would be a good combo torque converter, drive line and rear-end for street/ strip use?

Anyone?

Can you give us all the major specs on the motor and also tire size and vehicle weight if known?

Small block 400 bored 40 over to a 408. World S/R torquer heads 76 cc, Energizer Crane cam, Edelbrock intake, Carter carb 650 cfm, Flow Tech After burner headers, tires are 15s, 12 inches wide. 9.5 to 1 compression. I not sure about the weihgt. I'm looking for the specs on my heads and cam.

Not to be a rainstorm, but are you sure your engine is making 470-ish horsepower?
Your combo seems a bit mild to be making that kind of power. It seems more like an engine making less than 420 horses.

just an opinion,
i hope you make lots of big power

that motor should be pushing 450 ft lbs anyway.
as far as the rear gears, I would go with a 3.55 or 3.73 depending on how much highway driving you will be doing. My 68 also has a 406 and 3.36 gears and I thought I would want lower gears but it works pretty good with the 3.36, it ran 12.8 on street tires with those gears. I don't think I would go lower then 3.55 on mine because I take it on long cruises, ect. I would call Coan about the torque converter, I recently talked to them and they were very helpfull. I am going to put their 11" "pro-street" converter in mine as per their recomendation

For comparison, my '69 w/ 408BBC runs 3000 converter w/ 3.73 gears. Very streetable with 28" tall tire. Any less gear and the converter would probably slip too much depending on what speed you were driving. This seems to be a good combination. Most guys running 3.31's (or thereabout) drop down to a 2400 converter.

Before I got the heads and cam I was told by Barnette (Speed shop in Atlanta) I was pushing 375 horses, they said with the new heads and cam I might be around 450-475. This is what I was told. What would be a better head/cam combo to get 475 horses, I haven't put them on yet so I can still return them.

which energizer cam is in it now?

Specs on the Energizer cam
cam liftvalve Lift int .3200 Exh.3200 int .480 exh.480 Lobe ctrs imt107 Exh 117 Lash hot int.000 exh .000 adv. dur. int 284 exh 284 .50 dor. int 228 exh 228 adv timing BTC ABC BBC ATC .50 dur BTC 7 ABC 41 BBC 51 ATC (3)

I barely understand any of this. This was listed on the box of the cam.

almost a 280h
not mild
not wild
shane

210 cc intake heads dart/afr/pro action
xe274/xe284
i could be wrong but for a larger cube sb that stuff should do pretty good,oh possibly a carb thats a little more performance oriented
shane

I'll second the 200 cc plus heads and a cam in the 240 range @ .050. to compliment a 3.55-373 gear and a 2800-3000 stall would make the car really quick and driveable as a weekend cruiser. If you do alot of hwy driving i would just tighten up the converter a bit.

Your current cam and heads will be done at 4000 RPM.

Give competition products in Oshkosh, Wi a call..you can get the 215CC canfields complete from them for $1055 delivered.

Mike