I have a 2000 chev 3500 express van 1 ton . I have not been having a good time with this van. The engine is bad- bottom end. this is 6.5 with a turbo,but I have a chance to get a 6.5 non turbo.How much power & mileage do i lose ?:badidea:

How 'bout switching the block & pistons & keep the top end?

Remember, van turbo is in engine valley, and trucks aren't.

Power would go down but mileage may actually improve under normal driving conditions.

Switch the 6.5L n/a longblock for the bad one, bolt the rest of your 6.5L turbo stuff to it, including timing cover and waterpump, heads, ect.

are turbo and non-turbo models the same in the long block? I'm used to seeing NA engines have higher compression than turbo models... is this true in the 6.5?

You can't use the N/A engine in this application. You would get about 90% of the way completed during the shortblock swap (this is using the turbo on the N/A shortblock) and find out that the appropriate turbo mounts probably won't be there and the turbo oil drain location will also be missing. You're best off finding another van/hummer engine for this vehicle.

Where is the turbo oil drain on a van, in the valley? It might be possible to route it to the fuel pump cover area.

are turbo and non-turbo models the same in the long block? I'm used to seeing NA engines have higher compression than turbo models... is this true in the 6.5? same compression but the pistion looks like micky on the turbo and flat on the n/a.