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Old 10-15-2004, 11:23 AM
frankenvette's Avatar
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Which heads for my 350?

I want to beef up my 350 over the winter, but have a limited budget, here's what's doin with the engine now:

350 block, 4-bolt main, bored .030

federal mogul hypereutectic pistons, flat top, 4 valve reliefs, sealed power hydraulic flat tappet lifters, sealed power 7.790 rods,

stock 882 heads, 76cc, 8.34:1 compression

engle cam, 465 lift, 268 duration, gross lift 310, lobe centers 110, duration @.050 226

edelbrock performer intake with edelbrock 600cfm carb

The engine was built in 99 and runs pretty decent, and has moderate power, but I think better heads would help allot. Any suggestions would be appreciated!

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Old 10-15-2004, 12:01 PM
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I`m thinking you don`t wish to use vortec heads, as you would need a vortec intake and self aligning rockers and etc. but if these things don`t matter then they are worth the money, there biggest down fall is there light casted. As for your pistons, do you know the part number? if your pistons are the H345NP then they have .020 off the tops, the correct compression height for a 350 is 1.560, these pistons have 1.540, this decreased distance makes the piston about .045 in the hole at Top dead center which kills quench and hurts compression. Since your on a budget, I would do this, the 882`s flow the best of all the smogger heads, I would bowl port them and have them milled about .010, I would also have the block decked about .010 then I would get a set of Speed Pro H631CP pistons from dirt track thunder, these have 2 valve reliefs, coated skirts, and the correct compression height, I would also use GM head gaskets with .028 thickness, this would put your Quench distance in the range of about .043 or so which is fine. After you add this up it would come out considerably cheaper than a new set of heads or a used set that needed reworking. your compression ratio would come in at alittle over 9:1, the engine would be a lot more throttle responsive, more effiecient and would likely pick up 60 horses.
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Old 10-15-2004, 12:05 PM
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Take it all off the deck then plug it fpr strength. 882's can't be milled .010. Faces are too thin and head gasket retention problems will result. .004 MAX. And that pushing it in my opinion.
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