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Old 09-16-2010, 09:01 PM
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427td hp and tourq quess

hi, i am in the middle of puting in a 427 td into my 1976 gmc jimmy 4x4 and was woundering how much tourq and hp am i looking at, also a quess on how fast it would be. this is what i know about the truck;the enigne is rebuilt and very low miles, its bord 30 tho, stander mains and rods, has flotech headers, holly 4barle dublepumper and kn air filer. it hooks up to a tourq converter out of a th400 and runs threw a th350 trans,and a np205 transfercase. the rear gears are 308s and rolling on 31 tires. i also have a suppercharger i may put on it but heard these motors dont rev veryhigh and woundering if i should just leve it off, any help or advice would be great also as far as rice burners how would she hold up, thanks in advance

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Old 09-16-2010, 09:34 PM
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With the right heads, 6.535 rods and the normal 427 short deck pistons, a 427 td can very much rev plenty!

I might stay with the stock heavy truck pistons and rods if you use the blower, but then you wouldn't need to rev to the moon with a supercharger anyway would ya? How cool! My fav combo, 427 td with blower!!!!! Sweet.

Last edited by Dirty Biker; 09-16-2010 at 09:45 PM.
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