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Author Topic: 340 heads on a 65/273  (Read 484 times)
65Vart
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340 heads on a 65/273
« on: June 23, 2008, 10:40:23 AM »

I have a chance to buy some fresh 340 X heads. Can throw these right onto my 273 without problems?
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340fyd
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Re: 340 heads on a 65/273
« Reply #1 on: June 23, 2008, 10:42:23 AM »

I have a chance to buy some fresh 340 X heads. Can throw these right onto my 273 without problems?

I haven't ever tried it, but I've heard that the valve are to big and will hit.  I would think some nice 302 casting 318 heads would be a good choice with some 360 valves.
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Lee
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Jim_Lusk
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Re: 340 heads on a 65/273
« Reply #2 on: June 23, 2008, 11:23:11 AM »

No they won't fit without notching the cylinder walls.
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qkcuda
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Re: 340 heads on a 65/273
« Reply #3 on: June 23, 2008, 12:27:18 PM »

The big chambers would also kill your compression.
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GT_convert.
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Re: 340 heads on a 65/273
« Reply #4 on: June 25, 2008, 01:09:27 AM »

I used a set on my turboed 273...yes you do have to notch/cut a small radius around the intake valve.
Just do not go lower than where the highest point of your top piston ring will be on TDC.
It was a good way for me to lower my static compression.
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Road Racer
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