the 4bt will be enough... here in latin america it's widely used for hauling, and even towing... ford still offers this engine in f350 and f550...

 

seems like there would be plenty of room for a 6bt in there- unless you already have the 4bt:idea:

 

hopped up 6.5 (computor, marine injectors, manual wastegate controller, #9 restistor) is 160 rear wheel hp, my ve 4bt was 233 rear wheel. these wrer both on the same day same dyno. so a 4bt is a big upgrade. Dave

 

Dave,what kind of mileage would the 230 hp 4bt get in a one ton truck? and how much will it cost for that kind of hp? this truck will probably see lots of miles if it does well and is bearable to drive. it has 300k mi on it now but we think it is worth saving. Thanks for your input.

Bill

 

you should see between 20 to 23 mpg . all i had in the 4bt was a pdr fuel pin, 3200 governer spring, pod injectors, and compounding turbo's. you can run this in a single turbo i whould use a pdr hx35 with a 12cm gated housing. the rest is free tuning of the pump. Dave

 

What kind of hp would the 4bt have stock? And can these upgrades be done in the truck? I have herd that some bread vans are on gm frames so the swap should be rather painless is this true? Where can a guy get the upgrade parts?
Thanks
Bill