427 Big Block Truck Motors - Team Camaro Tech
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post #1 of 7 (permalink) Old Dec 2nd, 05, 04:27 PM Thread Starter
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427 Big Block Truck Motors

Are 427 Big Block truck "tall deck" motors any good?

Would one be worth putting in a car?

I am building a "grandma style street car" with COPO looks. I am doing on a budget and have access to one of these motors.

Thanks for the feedback.
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post #2 of 7 (permalink) Old Dec 2nd, 05, 04:37 PM
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Re: 427 Big Block Truck Motors

No, The Tall Deck Is Only Good For A Stroker Engine Around 510 Inches.........take The Engine And Rob The Steel Crank And 4 Bolt Caps.the Tall Deck Has 4 Rings Per Piston Far From A Hi Po
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post #3 of 7 (permalink) Old Dec 2nd, 05, 06:21 PM
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Re: 427 Big Block Truck Motors

I have heard rumors that you can run a 427 car piston with a longer .400" rod with these. Where you run into problems is most intakes for these are a tall single plane type. Also, header fittment and clutch linkage peices (because of the headers) becomes issues. I had a buddy with a 366 tall deck in a Nova. It actually ran pretty good. It had retangular port heads with a victor tall deck intake. He use to shift it at 6800 to 7000 RPMS all day. As far as I know he is still driving it like that. It had truck pistons in it with the four piston rings. The fourth ring I think is an extra oil ring. Remember these where in buses and HD trucks.

67 Firebird
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post #4 of 7 (permalink) Old Dec 3rd, 05, 09:09 AM
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Smile Re: 427 Big Block Truck Motors

As said, intake, distributor and header fitment issues are the main concern's, otherwise it should bore out an 1/8th" over and you can then stroke them out to about 550" if you grind the lower end. IF you want a cheaper, big motor.

To me tho, I'd find an old mid '70's to mid '80's P/U 454 core motor and build a 460/468/489/496 motor..

And I have a 496 in my car now.

If I was to ever build another one, I would buy a Merlin Pro block or whatever one is on sale that will bore to 4.625" and then install a 4.375" crank and make a standard deck height 588" motor!! For STEALTH, He, He!!!! (Probably looking at 700hp with a big solid cam!!).....

The guys in the know would know it's not a 396, but I figure my big headed other B-i-L won't know the difference!!


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post #5 of 7 (permalink) Old Dec 9th, 05, 12:06 PM Thread Starter
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Re: 427 Big Block Truck Motors

Does anyone else have any experience with building one of these for the street?
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post #6 of 7 (permalink) Old Dec 9th, 05, 05:11 PM
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Re: 427 Big Block Truck Motors

I currently have a tall deck 427 in my 68 Camaro. I use "car" pistons and rods that are .400" longer than stock. I have built a few of these for racing and for street use.
Email me if you have any questions about the tall deck motors.

68 Camaro, 555 big block, Doug Nash 5-speed, 3.54 gear.
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post #7 of 7 (permalink) Old Dec 10th, 05, 06:45 PM
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Re: 427 Big Block Truck Motors

If it were me I would either sell the tall deck 427 or rob the crank and caps and maybe the rods and build a car BB for the car. As pdq was saying GO BIG. You can pick up a 454 block pretty easy now days.
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