Thread: Dumb questions...
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10-03-2006 05:55 AM #1
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The only dumb question is the one you don't ask. Greetings. When you remove the carburetor, look at the mounting on the manifold. If it is square with four holes the same size, then it is a square bore. If the two rear holes are way bigger than the front ones, then it is a spread bore.
If the engine in your Jag is a 350, then it is a small block. You can tell by looking at the valve covers. A small block valve cover is held on at four mounting points--two on each side. Big blocks have more.
Lynn
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10-03-2006 06:00 AM #2
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Greetings! And thanks alot. I thought your answer to the carb question was how it worked, but I wanted to be sure before I drop 300-400 bucks on a carb.
Another question on big/small block. Does engine size have anything to do with it? Meaning is there such a thing as a big block 350?Last edited by MeeBit; 10-03-2006 at 06:02 AM.
My car: 1986 Jaguar XJS converted to Chevy 350.
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10-03-2006 06:10 AM #3
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No. 350's are in the small block family. You can bore and stroke them to a much bigger size, but they are still referred to as a small block. It is designated that way because of external physical size, not internal cubic inches.
Don
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10-03-2006 06:12 AM #4
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Ah! Thank you!
Originally Posted by Itoldyouso
That answers a very old question for me.My car: 1986 Jaguar XJS converted to Chevy 350.
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10-03-2006 07:06 AM #5
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Some of the guys like Denny on here are very good at finding drawings and things like that. Maybe one of them will post some showing the difference between a small and big block for you and others who may need this info.
Don
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10-03-2006 07:07 AM #6
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That would be great!
Also if my edelbrock manifold has 8 bolt holes, that mean it will fit either kind of bore, correct?My car: 1986 Jaguar XJS converted to Chevy 350.
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10-03-2006 07:55 AM #7
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Well, no. 8 bolt hole intakes were Vortec style, used from I think '87 up, and only on small blocks. Earlier (1955 up) used 12 hold down bolts on the intake.
If yours is truly a '74 engine, it should have 12 bolts. Looks like someone has put in a later engine.
Don
PS: Shoot us a picture or two of your engine.
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