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Old 06-04-2007, 09:25 AM
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1995 350 valve springs

I have a 1995 350 out of a 3/4 ton truck with 3/8 valve stems.It has a 480 lift cam ,will I have problems with the springs and valve seals,thanks.

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Old 06-04-2007, 09:50 AM
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You should always run the matched springs with the cam. Stock springs on a bigger cam can and will lead to spring failure. If you want to change springs you can do so with the heads still on by using either small rope coiled in the cylinder and the piston brought up in the bore until it compresses the rope and holds the valves, or you can use pressurized air through the spark plug hole. If you wish to do so then you may as well replace the valve seals also.
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Old 06-04-2007, 06:31 PM
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check for coil bind, you need like .060" of freespace before coilbind, 3/8" valvestems?-I thought all SB chevs used 11/32". The older motors without valve rotators could easily run .480 lift on a stock spring.
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Old 06-04-2007, 07:40 PM
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HD truck SBC motors have 3/8" exhaust valves, rotators and many have hardened exh seats. Not the hot setup for a 480 lift cam !
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Old 06-04-2007, 10:18 PM
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look into comp cams springs part # 986-16
i have 480 in 488 ex cam and these are the springs they recommended

97 silverado 3/4 350 3/8 valve stem
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