500/750HP engines and 750HP capable Tranny, for the GMC Motorhome Road Rocket.

thomas g. warner

New member
Mar 24, 1998
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You forgot the rear swivel wheels on the frame to steady the coach when you
pop a wheelie! He also has a 750HP version 455 CI engine for $15,000.

By the way Joe exploded another myth I have heard over and over and that was
with regards to the transmission being a weak link for the motorhome. He
has tested the GMC motorhome transmission on his dyno with the 750Hp motor
with no problems. He puts Heavy duty goodies in the tranny. I need the
info and am in the process of springing for the money to buy his
blueprinting book for the engine. Forgot to ask him if info is available
for the tranny mods.

After hearing how many transmission failures people are having I have a
suspicion that they are being rebuilt with standard Toronado parts.
Any other thoughts. Does anyone have an idea of what HD parts we can put
into our trannys?

>$10K for a new 500HP engine.
>
>Let's see......If I did that I'd need to figure in a few necessary related
>expenses like installation, a new torque converter, transmission and final
>drive. And with all that POWER, I'd better upgrade to 6 wheel discs and
>replace all the front suspension pieces so I can get that bad boy stopped
>and keep it pointed in the right direction. Then of course you gotta keep
>that puppy cool with a new radiator, hoses, etc..
>
>Shoot, that's only gonna run me about $40K to replace my tired OEM with a
>less reliable, less economical, wheel spinning street rod with beds and a
>toilet.
>
>Hmmmmmmmmmmmm
>
>Dave Lowry, '76 Royale, Santa Barbara
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Tom & Marg Warner
Vernon Center NY
1976 palmbeach