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Old 04-01-2009, 08:06 PM
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Chevy 505 Mark IV Engine?

Hello. I'm nearing the point of purchasing my engine for the studebaker project. Being a mopar man (and wishing I had the cash flow to support a mopar engine ), I'm not too sure about Chevy engines. I ran across a good deal on a Chevy 505 stroked Mark IV Engine. Any ideas on what kind of engine this could be?

Also, the motor doesn't come with accessories (distributor, headers, flywheel, starter, water pump, etc.). Is this a fairly common block which would be easy to find parts for?

Lastly, I want to put a 4 speed in my car, is it a common block to support a common bellhousing and input shaft combination?

Thanks!!

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Old 04-01-2009, 08:52 PM
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A "505" BBC if built from a Mark IV BBC block is a 427 or 454 block bore .100" over (4.35" bore) with a aftermarket 4.25" stroker crank.
Start by checking the block casting number and cylinder heads casting number.

if you are a Mopar guy:
http://www.arengineering.com/articles/articleframe.html

Last edited by F-BIRD'88; 04-01-2009 at 09:02 PM.
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Old 04-02-2009, 09:46 AM
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Wow, thanks for the link, I'm doing some research on the 451 kits right now. I'd love to build my own motor, but being my first build I would hate to drop 5k and not have done it correctly. Though I am quite meticulous and could do it right.

A question about the crankshaft in relation to automatic and manual transmissions (for both chevy and mopar motors). If I want a 4 speed, does the crank need to be machined prior to assembly, or is the change a simple pilot bushing to be installed after motor assembly?
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Old 04-02-2009, 04:44 PM
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I would investigate that way before final assembly.
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Old 04-02-2009, 06:56 PM
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I don't know about Mopar, but on all Chevy's it is just a pilot bushing or bearing driven into the crank. Cranks are all machined for it.
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Old 04-06-2009, 04:44 PM
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Interestingly, I put a 470 (466) together 35 years ago. I've always been cheap and was looking for a way to make an "inexpensive" big-cube Mopar. An aquaintance was looking for such a motor, so I built the short block using a 400 block bored to 4.360", offset-ground 440 crank, BBC rods with the pin end bored to accept BBF pins and used stock bore 429 pistons. The compression height works out right with the new stroke and Chevy rods. I had access to a Bridgeport at the time, so did the pin boring myself at "my cost". He picked up the short block and moved away shortly after that, so I never found out how the P/V clearance worked out. Always wondered.

Last edited by techinspector1; 04-06-2009 at 04:55 PM.
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