E85 500 HP 383 with a L31 truck intake

[L31MaxExpress]

Ok, I couldn't tell that by the first picture.... it looked like a flat plate. What is it made of? I like the stamped aluminum tanks. What brand radiator is that?

Shroud is aluminum. The radiator is a KKS. My buddy has been running one for about 4 years now in his 6.0L swapped 97 C1500. With dual 16" fans it has not had any overheating issues with the a/c blasting.

 

[L31MaxExpress]

Close to rolling on all 4 again. All I have left to do is final torque the control arm bolts, grease the ball joints, bleed the brakes and change the tie rod ends. Then bolt the wheels back on.

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[stutaeng]

My tape measure and measurements I took at a junkyard say the vans stayed the same. The vans already had the wider mounting spread of the NBS trucks back in 96. I measured a Vortec Max 14 bolt SF I have laying in the shop and it is the same spring mounting pad width as the van but a narrower rear end overall. Shock mounts stayed the same too and are unique to the vans. Both shocks go toward the front of the van. Front half of the van frames changed but the rear portion stayed pretty much the same.

I found a low mileage Dana 70 out of a newer Diesel van a few weeks ago complete for $300 with 4.10s. Should have snagged it.

I didn't know the Express vans came with 4.10s behind a Duramax. Interesting. I believe on the trucks they were only optioned with 3.73.

 

[Supercharged111]

I didn't know the Express vans came with 4.10s behind a Duramax. Interesting. I believe on the trucks they were only optioned with 3.73.

Vans got the 4L85E, maybe that's why.

 

[L31MaxExpress]

I didn't know the Express vans came with 4.10s behind a Duramax. Interesting. I believe on the trucks they were only optioned with 3.73.

I believe it depends on the year. I know some years GM would not put anything lower then a 3.73 with the Duramax 6.6.

 

[stutaeng]

Vans got the 4L85E, maybe that's why.

Yeah, I was thinking the same. Perhaps the final ratios are different on the Allison vs 4L85 that 4.10s in the vans worked well?

 

[Pinger]

My tape measure and measurements I took at a junkyard say the vans stayed the same. The vans already had the wider mounting spread of the NBS trucks back in 96. I measured a Vortec Max 14 bolt SF I have laying in the shop and it is the same spring mounting pad width as the van but a narrower rear end overall. Shock mounts stayed the same too and are unique to the vans. Both shocks go toward the front of the van. Front half of the van frames changed but the rear portion stayed pretty much the same.

.

For years I've wondered why most axles have their dampers arranged pointing fore and aft. Does anyone why?

 

[HotWheelsBurban]

For years I've wondered why most axles have their dampers arranged pointing fore and aft. Does anyone why?

My understanding is that it helps to dampen the bounce better from both directions......

 

[Erik the Awful]

It prevents axle hop.

 

[Jglew82]

Yeah, I was thinking the same. Perhaps the final ratios are different on the Allison vs 4L85 that 4.10s in the vans worked well?

Yeah, most likely because an 80/85e 1st gear is a 2.48 and the Allison is a 3.094