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Old 06-11-2006, 04:00 AM
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455 small Block

I am looking for a Pontiac 455 small block or a 473 stroker can anyone help me out?

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Old 06-11-2006, 06:39 AM
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All Pontiac 8 cyl. blocks are the same external size, so there is no small or big block Pontiac. From 287 to 455. The 455's were built from 70 - 76. Pontiac quit building V-8 engines in 1980 (for installation in 1981 cars). So if you are looking for a 455, you can start in the salvage yards looking for a 70 - 76 car. If you want a stroker, check these guys out.
http://www.butlerperformance.com/
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Old 06-11-2006, 10:50 AM
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Quote:
Originally Posted by redsdad
All Pontiac 8 cyl. blocks are the same external size, so there is no small or big block Pontiac. From 287 to 455. The 455's were built from 70 - 76. Pontiac quit building V-8 engines in 1980 (for installation in 1981 cars). So if you are looking for a 455, you can start in the salvage yards looking for a 70 - 76 car. If you want a stroker, check these guys out.
http://www.butlerperformance.com/

Wow, great info!

K
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Old 06-11-2006, 11:51 AM
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Confused!!!

then why do people advertise a 455bb and a 455HOsb??? or is it just the heads that are used? I am whats the differance?
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Old 06-11-2006, 01:57 PM
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Originally Posted by RookiePerformance
then why do people advertise a 455bb and a 455HOsb??? or is it just the heads that are used? I am whats the differance?
Because they don't know what they are talking about. Or they are trying to make it sound more appealing. Regardless, if it is a Pontiac engine, it has the same external dimensions regardless of the displacement, from 1955 through 1980 (81).
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Old 06-11-2006, 07:37 PM
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The main difference in Pontiac engines besides the bore size ithe the main journals of the crankshaft. The 421,428,and 455 engines had a main size of 3.25 inches. The 326,350,389 and 400 engines had a main journal size of 3 inches. The 455HO was only built for a couple of years, 71 and 72 and utilized round exhaust ports, same with the 455SD engines of 73 and 74. The remainder used what is commonly called the D-port head and on 455's had an extremely large combustion chambers. The best information, and the latest on building Pontiac engines is a book written by Jim Hand, Titled How To Build Max performance Pontiacs. A must for anyone wanting to build Pontiacs and very indepth on every Pontiac V-8 engine ever produced. Butler Perfomance is a very good source for stroker kits for Pontiacs as is Kauffman Racing, Ken's Speed and Machine (Pontiac Dude), SD Performance, Paul Spotts and Ken Brewer of Pacific Performance racing to name a few. All can also custom build your engine to any level of performance you want.
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