Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

SBC block question?

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Old 01-29-2006, 03:40 PM
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Default SBC block question?

I am building a carbed 383 for my 95 Formula. I need an older one piece rear main seal block. I can get a vortech motor if the block will work. So my question is. Is a vortech headed block the same as say a 86+SBC?

Thanks
Chad
Old 01-29-2006, 04:39 PM
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yes they are basicly the same.
Old 01-29-2006, 05:30 PM
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what would be the difference
Old 02-07-2006, 12:04 AM
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vortech has different intake bolt pattern
Old 02-07-2006, 06:34 AM
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doesnt the intake bolt to the heads? I have brodix heads and intake.
Old 02-07-2006, 01:07 PM
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Yes the intake bolts to the head. You will be able to run your heads and your intake on the Vortec block.
Old 02-08-2006, 12:46 AM
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yeah thats what i meant. the intake bolt pattern is the main diierence
Old 02-13-2006, 07:43 PM
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You are gonna have to cut your "vortec" block alot to clear the 3.75 in stroke crank. It will hit the rails of the block....
An old style block will work and you wont have to clearance the bock...
Old 03-07-2006, 02:50 PM
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To use a 2-piece rear main seal crank in the Vortec block, you can purchase a 1-piece seal conversion from Jegs or Summit for about $100. I'm using a 327 crank in Vortec block for my car.
Old 03-07-2006, 04:17 PM
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I have a crank for a one piece rear main seal so thats not a problem and I will have the machine shop clearance the block.




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