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FE Technical Forum / Re: 1964 390 block with extra main webbing and cross bolt bosses
« Last post by Dr Mabuse on Today at 06:02:02 AM »
Quote from: Wortttie on May 24, 2024, 10:37:03 AM
Hello all

... Though I will sonic test the bores I was wondering if this block had thicker cylinder walls than the normal 390 block.  My thought is that these blocks were being cast for a 427 bore but did not have enough wall thickness to pass inspection.  I am probably wrong but I would like to know what you experts have to say.

I am an expert reader, and long ago learned that FE's being "thin wall" castings, means that core shift is a major consideration when sonic checking cylinder walls.

Also, FE's are subject to cylinder wall flex and the concomitant reduced horsepower effect. Never ever never bore an FE any more than necessary -- a stroker crankshaft is the best means of increased displacement.
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Private Classifieds / Re: Crower 8H 8-hole Magnesium Fuel Injection
« Last post by frnkeore on May 24, 2024, 05:20:36 PM »
Gene, what is the distance, from the front of the first throttle to the back of the last one?
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FE Technical Forum / Re: 1964 390 block with extra main webbing and cross bolt bosses
« Last post by MeanGene on May 24, 2024, 04:47:03 PM »
Quote from: pbf777 on May 24, 2024, 04:00:38 PM
     The additional webbing and the cross-bolt bosses were also seemingly commonly found in the '64 Mercury 410 blocks.    :)

     Scott.

That would be very rare as the 410 Merc FE was 66-67 only
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FE Technical Forum / Re: 1964 390 block with extra main webbing and cross bolt bosses
« Last post by Heo on May 24, 2024, 04:14:13 PM »
I  dont know if thats a -64 thing but i have seen several 64 blocks that way
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FE Technical Forum / Re: 1964 390 block with extra main webbing and cross bolt bosses
« Last post by pbf777 on May 24, 2024, 04:00:38 PM »
     The additional webbing and the cross-bolt bosses were also seemingly commonly found in the '64 Mercury 410 blocks.    :)

     Scott.
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FE Engine Dyno Results / Re: 464 fe
« Last post by 1968galaxie on May 24, 2024, 03:25:08 PM »
The old streetmaster looks to work quite well!
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FE Technical Forum / Re: 1964 390 block with extra main webbing and cross bolt bosses
« Last post by Heo on May 24, 2024, 12:40:13 PM »
i have a police interceptor block like that. No thicker cyl walls than a ordinary 390 block
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FE Technical Forum / Re: Flexplate
« Last post by Jb427 on May 24, 2024, 12:31:17 PM »
I use an ATI c6 flex plate and a powermaster starter 0 problems at all. I been running mine for about a year now and I had the inspection plate off not that long ago and teeth looked good.

I will say that when I had my converter made it was made with 3/8th bolts and the ATI flex plate was 7/16 not sure why the converter guy did that just lazy I think but I fixed that with out any real problem.

something else to add did you buy the kit? flexplate and crank adapter kit? or just the flexplate?
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FE Technical Forum / Flexplate
« Last post by Stangman on May 24, 2024, 11:49:25 AM »
So just received new Flexplate from Jegs. Just took a look at it and I’m not near my original one but this one is way thicker and heavy duty. It’s an ATI for a C-6. So of course I’m gonna check were the ring gear sits in relation to block but should starter engagement still be good.
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FE Technical Forum / Re: 1964 390 block with extra main webbing and cross bolt bosses
« Last post by frnkeore on May 24, 2024, 11:26:18 AM »
There is about a 99.9% chance that it doesn't have 427 cylinder cores but, it could have a little thicker cores in it.

Are there any markings on the rear of the block? A picture of that area would help, a lot. Of course a sonic test will tell you what you have to work with. Also, you can pull the expansion plugs and measure between the cylinder walls with drill bits or, I use Allen wrenches and get a good idea of the thickness of the walls by how much space there is between them.
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