390 connecting rods

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Sep 20, 2004 | 03:34 PM

jazzy66

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From: South

390 connecting rods

I am having a 352 bored to a 390, are the piston connecting rods the same in a 352 and 390 big block?

Thanks

Sep 20, 2004 | 04:10 PM

rusty70f100

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Joined: Jan 2003

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From: Iowa

No they are not. And, if you just bore it to 390 specs you'll end up with a 360. To have a 390 you need a 390 crank. You might be able to get away with the 352 rods though, tell us more about your desired build.

Sep 21, 2004 | 09:36 AM

jazzy66

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From: South

To make a long story short. I got a 390 from a boneyard had the crank polished but the block could not be bored. I still have the 390 crank but I returned the unusable block and 390 pistons , he gave me a 352 which I having to bore to a 390. I wanted to if I could use the 352 connecting rods on a 390 crank or would I have to scrounge up some more 390 pistons.

Thanks

Sep 21, 2004 | 09:48 AM

Mike G

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Joined: Nov 2002

Posts: 3,447

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From: Littleton, CO

Buy some 390 rods as they are stronger, then get some 390 passenger car pistons, not for the truck application as they would be low compression items.

--Mike