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Old 08-08-2018, 10:55 AM
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318 small block

I have a 318 block that was out of an 89 w250 and I was gonna build it for my 390 stroker build but the block turned out to be bad. I'm searching for another 318 platform to build on. I was wondering what are the best 318 blocks that were made because I found out there was slight changes. Like what years had the best most durable block for the 318s?? Any information would be great. Thanks in advance
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Old 08-08-2018, 05:13 PM
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Last sentence finishes,weight more.
Attached Thumbnails 318 small block-1e150cfa-977c-4131-ae8e-369e7f60b9b1.jpeg  
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Old 08-08-2018, 08:51 PM
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So basically all 318 LA motors were made of hi-nickel alloy.
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Old 08-08-2018, 08:52 PM
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So what I'm gathering is use anything from 68-72 and 75-92
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Old 08-09-2018, 06:33 PM
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I read all newer than 1973-74 are 4 to 8 lbs lighter.

If your serious about the best 318 block find a nhra stock eliminator in O,P or Q with a 318 and I'm sure they'll know. other than that sonic test a few of them.
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Old 08-10-2018, 04:55 PM
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The 72/73 and possibly the 74 360 block can be bored to 340 bore size up to 40 over as it has the same core as a 340. But this change in 74 or 75.
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