Line bore 400 to 440 main size or cut the crank?

[bb71challenger]

I have a nice steel 440 crank out of a 68 440. I am thinking of making a 451 with my 400. What is the best way to go about getting them to fit one another? Whats the best way to go? How much difference between the two main sizes?

[djwhog]

This is the way to go.
When deciding what engine to drop in our 'Cuda, we first had to consider what we had available. Our goal of 10-second elapsed times pretty much dictated big-block power, and we just happened to have a 400 big-block available that didn't cost us a dime. Since making 650 hp from 400 cubes would be tough, we decided to match our 400 block with a forged 440 crank that we also had at the shop to net a displacement of 451 ci. We've found the low-deck 451 engine to be a powerful and durable combination, also making plenty of torque to get our 'Cuda moving. This combination does require that the crank's main journals be turned down to the main journal size of the 400 and some clearancing of the block in the main-webbing area, but other than that, it's a straightforward build since several manufacturers offer pistons for this application. our block would need to be machined, and for that we sent it to Chenoweth Racing Enterprises.


http://www.moparmusclemagazine.com/projectbuild/mopp_0703_barracuda_engine_build/index.html

[Chryco Psycho]

it can be done either way & the block bore would seem to be the stronger way to go but most turn the crank down instead

[ragtopdodge]

If the crank needs grinding anyways, do the crank.

If it just needs a minor polishing...line bore is an option.

NOt sure which one is cheaper or stronger.

[mopar12372]

on ot the other $ is about the same

[TROUBLE987]

for what it cost to do the 440 crank..you better off just ordering a 440 source crank and your ahead..just my

[Chryco Psycho]

the 440 Source stroker kit is a great value
you get crank, rods, pistons, brgs & rings all balanced for $1800

[TROUBLE987]

the 440 Source stroker kit is a great value
you get crank, rods, pistons, brgs & rings all balanced for $1800

yea it really is..im so glad these guys came along..they have made building mopars alot easier on the wallet..my last 451 i built i used there high hp crank and we was spraying a 375 of nos to it and it went 8.68 no problems,still going today with the same crank..and that was 31/2 years ago..so im sold on the stuff...