small block big block conversion

[biggun79b]

i have a 86 blazer full size has a 350 with 700r with 208transfer case changing to big block 454 what am i going to have to change if any thing

 

[4X4HIGH]

Nothing, pull sbc out, stick bbc in. You will have to correct the exhaust pipe but that should be about it, oh and maybe do something about the lower radiator fitting size.

 

[supersize75k5]

larger radiator,
different radiator top plate support
lower hose changes a tad


dist
alternator
flywheel
motor mounts
starter

shoud all work, the water pump, and brackets are different though


bigger gas tank
more brakes
and rent some space cause your smile will be huge!

 

[biggun79b]

Is ThE 700r Going To Handle The Big Block And Is There Any Thing I Have To Change On The Drive Train For Hook Up AS FAR AS LENGHT DIFERANCE BETWEEN TEH SMALL BLOCK AND BIG BLOCK AND HOW ABOUT THE DETENT CABLE IS THAT GOING TO HOOK UP

 

[supersize75k5]

if you drive in moderation...the yes the 700r4 should be ok, if its a stock motor with penut heads then its not a monster anyways, but the diffrerence will be huge.

i have only run a t-400 behind my big blocks, for the cable qestion i cant help


on thing to add though is that trucks and subs came with big blocks and small blocks, so its a faily straight forward swap. I would look into a reliable, recomended tranny shop to build you a qulity unit, also at the minimum add a cooler and a temp guage and NO nuetral drops,

I would venture to say the rear axel would go first if you drive hasty with the big block

 

[biggun79b]

Thanks For The Help Got Coller And Guage Now And Axles Will Be Next If I Can Find Some 3/4 Tons That Is And I Would Like A 4 Speed If I Could Find One In My Area Most On Here Are To Far Out But Thanks For Teh Replies Tey Helped Alot

 

[hero]

Make sure your torque convert bolt pattern is the same....before you drop the engine in.