302 or 351?
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Senior User
Joined: Oct 2003
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From: Southeastern N.C.
302 or 351?
I can get my hands on a v8 but i'm not sure if it's a 302 or a 351.
I remember the valve covers on a 351 being alot wider than the 302 but this one looks like a 302 to me but the owner swears it's a 351. How can I be for sure? It is still in the orginal car.
I remember the valve covers on a 351 being alot wider than the 302 but this one looks like a 302 to me but the owner swears it's a 351. How can I be for sure? It is still in the orginal car.
Tuned
Joined: Mar 2004
Posts: 281
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From: Petersburg, MI
Originally Posted by herothc2003
I remember the valve covers on a 351 being alot wider than the 302
New User
Joined: May 2004
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<LI>The 351W has a taller deck height than the 302. (a 302 will have the intake almost flush with the base of the distributor... where it goes into the block..... a 351w will have about 1/2 inch lip there where the intake meets the block.)</FONT></FONT>
<LI>Since the deck height is taller the intake manifold is wider on the 351w than on the 302.</FONT>
<LI>The 351W uses a larger main journal than the 302. there are 2 physical ways of telling a 302 vs. a 351w. Also, in between the frost plugs on a 351W there will be what appears to be a triangle or diamond (the way I was told) indented cast into the block...a 302 doesn't have those.
<LI>a 351W is wider between the heads compared to a 302 (the intake manifold is wider by about 1-1/2") and 351 pistons have a different pin height. You can use 302 pistons in a 351 if you stroke it to a 393
<LI>quick ID tip: The lower thermostat housing bolt on the 302 will be below the top of the water pump and you won't be able to put a socket on it. On the 351W you can remove the bolt with a socket.
<LI>Since the deck height is taller the intake manifold is wider on the 351w than on the 302.</FONT>
<LI>The 351W uses a larger main journal than the 302. there are 2 physical ways of telling a 302 vs. a 351w. Also, in between the frost plugs on a 351W there will be what appears to be a triangle or diamond (the way I was told) indented cast into the block...a 302 doesn't have those.
<LI>a 351W is wider between the heads compared to a 302 (the intake manifold is wider by about 1-1/2") and 351 pistons have a different pin height. You can use 302 pistons in a 351 if you stroke it to a 393
<LI>quick ID tip: The lower thermostat housing bolt on the 302 will be below the top of the water pump and you won't be able to put a socket on it. On the 351W you can remove the bolt with a socket.
Last edited by surfrider; Oct 25, 2004 at 05:15 PM.
