[hd71xlh]

can I just swap a BB 400 in to a truck that had a 318 in it ? if I use the 400 radiator Ect.. will the 727 just bolt up to the 400 ?

 

[cooper30]

I haven't done the swap, but if all goes as planned, I will be doing it around June. (440 for 31

There's some good info in this FAQ

Also, there have been quite a few posts about the swap (many for a 440), so try a search on "440" or "big block".

Bouchillon Performance has a lot of parts for the swap. I've also read that parts are still available from Dodge.

 

[Murdoch]

no the 400 won't bolt up to the 318 trans, you need a big block trans. i am working on this swap right now into an 85 ram so if you have any questions just IM me or post on the site.
shawn

 

[ProjectM880]

Im swapping a 440 for my 318 in my 77 W200 right now. You will need a big block tranmission. You can swap out the tail housing on the small block tans and the big block trans. so you can get a 2wd big block trans and just swap the tail houseing.
You will need a rear sump oil pan and new dip stick. Truck motor mounts unless you pulled the engien froma truck. Cooper30 posted a good site to get that stuff.

 

[Uncle Jay Tupelo]

Check Advance Adapters for an adapter for a big block engine to a small block tranny. I have heard of this being done. I am pretty sure it was Advance. I know you can't go from a big block to a small block and use the same tranny. I am going in that direction, luckily I have the tranny that came with the engine. Any info about swapping a 440 will be valid for a 400.

I have a 400 and I think it is best used as a boat anchor. I'll take a well built 318 any day.

 

[awyseguy]

I would prefer a 440 as well, but I miss my old 400, and would love to have another one day. Biggest thing keeping me from pursuing that is having to feed it at current fuel prices.
Aaron

 

[auwing]

I am working on this now still looking for bb bellhouseing and flywheel thats all i am missing

 

[Gohot]

Will the yolk from the 904 trans (on 2x4) work with the big block 727  ? Do you have any fittment problems with stuffing a BB in an RC (84) like power brake canister?

 

[440_Offroader]

You don't need the smaller OD brake booster with a 400, just the 413/426/440. They are a RB (raised block) engine. The 361/383/400 are a low deck engines.

 

[Gohot]

Will the yolk from the 904 trans (on 2x4) work with the big block 727 ? Do you have any fittment problems with stuffing a BB in an RC (84) like power brake canister?

Please, an answer guys... will the driveshaft have to be changed or a different yoke or anything?