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Old 04-20-2012, 07:44 AM
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Looking for Block

I want to build a budget Big Block Chevy. When looking for a block is there a certain year or type of vehicle to stay away from? Are all blocks the same?

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Old 04-20-2012, 09:10 AM
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Ok,

I'll start here and let other Members join in-

There are different Displacements (366,396,402,427,454,502) offered, along with two different Deck Heights (9.8", 10.2"), and with three different "Generations" (Mark IV, Gen V, Gen VI), so lots to choose from-

If you are looking for cheap, 396's are becoming a bit of a boat anchor, as 500"+ Displacements are becoming the norm with all of the aftermarket stroker kits available today.

Staying with the cheap scheme, if you are looking for horsepower, I'd suggest a set of 049 or 781 castings (the 781's replaced the 049's), as they flow well, but they be a little big for a 396, depending on the application.

A 2 bolt Block will do for most, along with a carefully selected stock crank.

It isn't as popular, but I am a Gen VI fan-one piece rear main seal (better sealing), the oil flow path has been moved away from the Oil Pan rail (which is better if you are using a BIG stroker crank), 4 bolt mains as standard-they are a good choice in my Book, but there are detractors-some say they aren't as strong (?)-other than that, the Rods, Pistons, Heads, most of the valvetrain, and other small parts generally will interchange.

Anyway, there are a lot of combinations available (427=454 bore, 396 crank (3.76")-here is a chart of some of the possibles:

http://www.roadsters.com/bbc/#bore

What are you going to do with this, and what is your Budget?
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Old 04-20-2012, 11:13 AM
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I would like to run a small supercharger,look and sound cool on the street. No competition racing. Are the 90's and up models set up for roller valve train? What is a tall deck block?
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Old 04-20-2012, 11:22 AM
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Quote:
Originally Posted by 4spdss
I would like to run a small supercharger,look and sound cool on the street. No competition racing. Are the 90's and up models set up for roller valve train? What is a tall deck block?

You said in your first Post that you wanted a "budget" Big Block-what is your budget?

The Gen VI's are set up for a Factory Roller valvetrain, although you can retrofit Roller Lifters into any Block. A tall Deck Block has a centerline Main Bore to Deck dimension of 10.2"-
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