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Re: [GMCnet] new engines for the GMCs [message #316316 is a reply to message #316311] Thu, 20 April 2017 13:54 Go to previous messageGo to previous message
James Hupy is currently offline  James Hupy   United States
Messages: 6806
Registered: May 2010
Karma:
Senior Member
Wonder how a tm 425 will like 500 foot pounds of torque? Probably not much,
I expect.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

On Apr 20, 2017 11:50 AM, "Mike Sadlon" wrote:

> Some of you may be following this from the Facebook page. I have been
> looking into the viability of the LS engines for GMC motorhomes. Problem
> number
> one was getting the LS engine to hook to our 425 transmissions. The
> Panrail on the LS interferes with our differential. I solved the connection
> problem by rotating the transmission up about 25°. That allows clearance
> around the Panrail and diff. The next problem was the transmission now
> interferes with the step area. It could be worked around but it
> illuminates a True Bolt-in situation. I have identified an aftermarket
> block that
> would get us 427 in.³ relatively easily. And still fit in the stock
> location. The target for the horsepower of this engine would be 450 HP and
> 500
> pounds of torque. They can have late-model fuel injection and coil on plug
> spark system. I'm ready for questions
>
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