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Old 08-13-2010, 06:13 PM
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Early Chev/oller Cam Chev Differences

Gidday guys. Justplanning my next build so I can start buying items over the next 12 months. I am planing on building my first roller engine and plan on using factory roller block. Is there anything specific I need to know about these blocks. A few questions:
Can I use heads made for early non roller blocks(dart iron eagles etc)
Can I use pistons and rods for a early block with these later blocks?
What parts are compatable between the two ( dizzy? fuel pump? flexiplate? starter? etc)
The project is a while off as I haven't even finished my current one, but I'd like to start buying parts now.Just need to know the differences as it will be a hot street carburettor 383 engine. Thanks

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Old 08-14-2010, 08:31 AM
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They are basically the same in most aspects. Starting in 87, the rear of the block was different because of the one-piece rear main seal. Many 92-later blocks aren't drilled for the fuel pump pushrod so you'll need an electric pump (or have a machine shop drill the hole.)

Heads interchange all the way back to about 1956.

Roller blocks have taller lifter bores and bosses drilled for lifter retainers. This is why you can't put a plain roller cam/lifters in an old block. They sell retrofit roller lifters that work in older blocks, but they cost about as much as the whole engine.
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