Titanium Rat

Right now i have a 350 w a th350, and just bought a 454 and a th400. I know some things need to be changed (springs, radiator). but other than those two things is there anything else that i HAVE to change just to get this thing where i can drive it. I will slowly change other things that are neeeded to hold the extra HP.

Is a th400 a direct replacement for a 350?

On the drivers side of the trand there is a single red wire coming out,,,,what is it for? (the motor/trans is out of a 78 suburban)

any help or insight on this new project of mine would be much appreciated :thumbs:
-------------------------------------
figured some of you might get a smirk out of these pics,,,check out page two http://www.corvettecrew.com/forum/in...y;threadid=500



[Modified by Titanium Rat, 8:42 PM 9/22/2003]

Corey_68

The TH400 will bolt up to the BB just as easy as the SB (same mounting holes)

You'll need:
BB pulley's (pretty expensive, # correct WP pulley is $300 :eek:)
BB brackets
BB short Water pump
Hoses
BB springs(might be able to get by w/ you stock SB springs for a little while)

Since you have a '78 it should fit under your stock hood. :D




[Modified by Corey 68, 8:58 PM 9/22/2003]

Titanium Rat

78 :eek:..............76 :yesnod:
ill just use aftermarket pulleys
new springs when i can afford some

Does the 400 use the same driveshaft yoke as the 350,,,,,,,,,or would the driveshaft need to be shortened?

thanks for the info corey :flag

Corey_68

My bad, it's a '76 :D

March Pulleys makes a great set of pulleys that will work for your setup.

I'm almost positive the Th350 and Th400 use the same driveshat, if not it should cost <$100 to get it shortened.

You going to LOVE that BB. :thumbs:

Brettmc

I think the 400 is longer than the 350. You might need some driveshaft work or a different one. Take a look at some of the serpentine conversions from March, Vintage air, and others.

Brett :thumbs:

markdtn

THe single red wire is the kickdown. You will need a different driveshaft and yoke to change from TH350 to TH400.

coldwarrior2000

will it fit under a stock hood? i thought BB hoods had a little more clearance than the SB hoods

Larry B.

Hood are the same from 73 on

Titanium Rat

i am afraid this trans wont work without some modification to the tail housing its out of a BB 78 suburban here are some pics,,,,,,,,,,,it seems to be stout as hell but will it work? there is a bolt going through the yoke into the main shaft. Would it be possible to keep that tail housing so i can use the HD shaft and just shorten the driveshaft, the and just leave the bolt out so it can slide a little. i think the only reason the bolt is there is because on the burban there is a two piece driveshaft and it slides in and out of the unit half way back to the axle.





[Modified by Titanium Rat, 11:08 PM 9/23/2003]

NHvette

Mmmm - I want an old BB like that.

How much does an old BB like that set you back ?
I can't afford the $5k+ for a BB crate motor.

:seeya

Titanium Rat

i bought the whole truck for 1200,,,,,,,junking the rest and giving some parts to twin_turbo,,,,,,,,,,,,,

BTW, Marck, ill take the parts off today and box them up for you tomorrow, got your list last night.

Any thoughts on the transmission yoke problem/question?