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Old 10-26-2002, 02:54 PM
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Post SBC Heads

I have another question for someone who knows. I have access to a 350 out of a 72 Chevelle. The problem is that there are no heads with it. I also have access to heads from a SBC 400. Can I use the 400 heads on the 350? Compression ratio problem? I know that the 400 has siamese water jackets on it does this create a problem? Will the bolt holes line up? Any other problems I don't know about?
Thanks
Jerry

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Old 10-26-2002, 05:01 PM
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Go to a GM dealer and get a engine performance book. It tells you everything on blueprinting a motor, plus the heads. Use a Fel-Pro 1014 marine head gasket for the hole location.(they have the steam holes for a 400sbc). Plus the gaskets have been revised coolant holes to even out the coolant flow. Do the heads have coolant holes drilled in them? Depends on the type of head, and valve size, you would have to do a clearance check. It would be good to know the casting # so you know what type of head it is. The valves mite hit the pistons because of valve size to piston relief size.
If you want to buy so heads go to this site and get some good ones.
www.spoperformanceparts.com/

Go to this site and look them up.The casting # is on the top of the head between the valves.
http://www.chevymania.com/index.cfm
George

[ October 27, 2002: Message edited by: 1BAD80 ]</p>
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Old 10-26-2002, 05:13 PM
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George - Thanks for the fast reply you answered all my questions right out the gate. Without your information I could have jumped from the frying pan right into the fire.
Jerry
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Old 10-26-2002, 06:51 PM
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The steam holes are a mute point, cause if u put em on a 350 they are blocked off anyways, cause u dont need em on a 350, but u can use the gasket he mentioned. The 400 heads have all of the original 350 cooling holes, plus the steam holes, but they are, once again, a mute point. The casting numbers are 3927186 and I think the valves are 2.02/1.60 but they might be 1.94/1.50. They each weigh about 45 pounds. If shipped fed-ex or the usps id have to ship the heads individually cause i cant go over 70 pounds in a package. Your choice of ups or fed-ex, cause they both cost 13.60 a package, so if u still want I have it all ready.

Mitch


P.S.- On that website the other guy referred it says these heads are small double hump heads, go figure, lol.
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Old 10-27-2002, 07:54 AM
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I forgot they were going on a 350.
The valve size is a mute point.I would like to know what they are before I bought them.
Their a 64cc head.
If they are 2.02's there is a good chance of bending some valves with a .480 lift cam on a 350.
Its easy to take a ruler and measure accross the valves.Taken from site 3927186 from years 68-72 1.94/1.50 & 2.02/1.6 (for hp levels 290-370)
64 CC Chambers
have bolt holes for brackets.
These are the small doubble hump heads

[ October 27, 2002: Message edited by: 1BAD80 ]</p>
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