chvymudin3388
1/2 ton status
is a chevy 400 a small block or a big block not to sure if it is a small block can i swap it with my 350 and are all the componets the same like intake and manifold and all
CK5
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400 chevy swap
- Thread starter chvymudin3388
- Start date
darenofears
Registered Member
reply
it is a small block
but i am not sure about the components swapping
it is a small block
but i am not sure about the components swapping
Leper
1/2 ton status
This weekend I am replacing a 350 with a 400. The flexplate on the 400 is different. IIRC the 350 and 400, externally, are the same. I don't know if the intakes are interchangable, but if you are swapping one for the other there is no problem as long as you have the 400 flexplate.
Muddytazz
1 ton status
the flexplate/flywheel and the front dampener are the only things on the outside of the motor that are different. All other external stuff will swap over from 350 and 400. Internal stuff on the otherhand is different.
most likly not but make sure its not a 402 bbc. some people might get them mixed up. thay look like a big block as thay are. just 402 cid. if the exaust ports are sistered in the heads in the middle 2 then small block. if all 4 seperate then big block. but likly not.
and as listed before dampener and flex/flywheel diffrent on 400 sbc.
and as listed before dampener and flex/flywheel diffrent on 400 sbc.
sweetk30 said:
When the 69-72 trucks got a '400' it was actually a 402ci bbc (396ci + 0.030" factory overbore).
A couple other snags you might run into for 350 vs. 400 sbc is the heads. 86+ sbc heads & intake have a different angle on the center intake bolts. 400sbc heads have steam holes - essential cooling feature for the siamese-bore 400 block. (Other sbc heads can be drilled, but cracking afterwards can be problem with some of the lighter castings.)
muscle
1/2 ton status
400 is externally balanced. you will need flexplate, balancer. Intake from the 350 will swap over. same with brackets, pulleys etc.
have fun
have fun
chvymudin3388
1/2 ton status
the 400 im lookin at is in a 79 chevy truck so does ne body if its the 402 bbc or 400 sbc?
smallblock
Specs here at the bottom of each page:
http://brochures.slosh.com/1979/th-pickups10.jpg
http://brochures.slosh.com/1979/th-pickups11.jpg
Specs here at the bottom of each page:
http://brochures.slosh.com/1979/th-pickups10.jpg
http://brochures.slosh.com/1979/th-pickups11.jpg
Clod_King
1/2 ton status
as I understand it, the 305, 350, 400 are all based on the same block, and the major difference is in the stroke.
Clod_King said:
The 400 block is very different from the others. It has siamesed cylinders along with a different cooling design.
beater_k20
Banned
u2slow said:
not true, the 400 SBC was introduced in 1970. i have seen several "400" fender emblems, open the hood, find a 400 small block.
beater_k20 said:
Cars are that way... 72-older trucks only had a bigblock '400'
http://brochures.slosh.com/1971/pickup10.jpg
http://brochures.slosh.com/1971/pickup11.jpg
Clod_King
1/2 ton status
what are "siamesed cylinders"?
Leper
1/2 ton status
My 350 to 400 swap ended up being a 305 to 400 swap. The starters are different.
