305 to 350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

77ChevySharkBite · 08-01-2013, 03:30 PM

I've come to a great point in my build, but I need some help from you guys!

I'm picking up a Chevy 350 block this weekend, and I currently have a Chevy 305 in my truck so my question is, is what parts are interchangeable on these motors? I know I'll have to get different heads, and pistons for sure. Is the oil pan, crank, flex plate, harmonic balancer, timing chain, if there's anything missing can you please inform me on what can, and can not be switched over.

Thanks fellas!

INSIDIOUS '86 · 08-01-2013, 05:31 PM

Rods and pistons are useless so is the crank since its balanced for a lighter 305 rotating assembly. Heads-depends on what you have
Pan and intake obviously fit. Flex plate works timing chain should be tossed and replaced they are cheap enough same with the cam.
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77ChevySharkBite · 08-01-2013, 05:49 PM

Quote:

Originally Posted by INSIDIOUS '86

Rods and pistons are useless so is the crank since its balanced for a lighter 305 rotating assembly. Heads-depends on what you have
Pan and intake obviously fit. Flex plate works timing chain should be tossed and replaced they are cheap enough same with the cam.
Posted via Mobile Device

Thanks Insidous what about the balancer can that still be used or should I get a new one of those too?

INSIDIOUS '86 · 08-01-2013, 09:08 PM

Better to have a matching balancer. But usually they are neutral balanced since both engines are normally internally balanced.
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08-01-2013, 03:30 PM	#1
77ChevySharkBite Registered User Join Date: Aug 2012 Location: Houston, Texas Posts: 2,475	305 to 350 I've come to a great point in my build, but I need some help from you guys! I'm picking up a Chevy 350 block this weekend, and I currently have a Chevy 305 in my truck so my question is, is what parts are interchangeable on these motors? I know I'll have to get different heads, and pistons for sure. Is the oil pan, crank, flex plate, harmonic balancer, timing chain, if there's anything missing can you please inform me on what can, and can not be switched over. Thanks fellas! __________________ Korwin 77 C10 Silverado Sharkbite LWB Build 67 Chevy C10 Frame Off 06 Dodge Magnum 2.7v6 aka swag wag! 2010 Honda Accord 2.4I4 DD aka Liquid Metal

08-01-2013, 05:31 PM	#2
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: 305 to 350 Rods and pistons are useless so is the crank since its balanced for a lighter 305 rotating assembly. Heads-depends on what you have Pan and intake obviously fit. Flex plate works timing chain should be tossed and replaced they are cheap enough same with the cam. Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

08-01-2013, 09:08 PM	#4
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: 305 to 350 Better to have a matching balancer. But usually they are neutral balanced since both engines are normally internally balanced. Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511



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