BB/SB swap, have questions
Thread Starter
Le Mans Master
Joined: Sep 2002
Posts: 9,386
Likes: 0
From: 30 mins north of Charlotte NC
BB/SB swap, have questions
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:
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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]
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]
Team Owner
Joined: Feb 1999
Posts: 34,455
Likes: 665
From: Republic of Texas
Re: BB/SB swap, have questions (Titanium Rat)
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]
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]
Thread Starter
Le Mans Master
Joined: Sep 2002
Posts: 9,386
Likes: 0
From: 30 mins north of Charlotte NC
Re: BB/SB swap, have questions (Corey 68)
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
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
Team Owner
Joined: Feb 1999
Posts: 34,455
Likes: 665
From: Republic of Texas
Re: BB/SB swap, have questions (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
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
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:
Safety Car
Joined: Jul 2002
Posts: 3,770
Likes: 3
From: St Louis MO
Re: BB/SB swap, have questions (Titanium Rat)
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:
Brett :thumbs:
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Thread Starter
Le Mans Master
Joined: Sep 2002
Posts: 9,386
Likes: 0
From: 30 mins north of Charlotte NC
Re: BB/SB swap, have questions (bluevetteman)
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]
[Modified by Titanium Rat, 11:08 PM 9/23/2003]
Le Mans Master
Joined: Jun 2002
Posts: 8,339
Likes: 24
From: I can walk to MA
Re: BB/SB swap, have questions (Titanium Rat)
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
How much does an old BB like that set you back ?
I can't afford the $5k+ for a BB crate motor.
:seeya
Thread Starter
Le Mans Master
Joined: Sep 2002
Posts: 9,386
Likes: 0
From: 30 mins north of Charlotte NC
Re: BB/SB swap, have questions (NHvette)
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?
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?
