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Old 11-14-2007, 10:39 PM
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283

what do you all think about my 283 w/ 327 heads some guys say the set up is good some bad some say 305 heads would work better. if so how much could i get out of the heads (talking about modifications) also would it do any good to cam the engine?
what other in expensive hp booster might I throw in the mix? i've got my intake and carb picked out.

thanks
- stray cat

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Old 11-15-2007, 12:19 AM
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If you mean "what do we think about putting 327 heads on a 283", then I would answer that 327's came with a lot of different heads. The first thing you need to consider is the fact that .202 valves wont work on a 283 because they are simply too big for the small bore.

I think that the biggest ones ever used on a 283 were 194 valves.

It would be interesting to see what a guy could do with a little 283 nowadays. A set of Vortec heads on there might be kind of fun. What vehicle do you have it in??

305 heads might work real good on a 283 too.

What carb and intake are you going with? Knowing these things and what you want from the motor is essential for proper cam selection.
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Old 11-15-2007, 05:44 AM
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283

The 305 Vortec heads would be some of the best to try.

327 heads have larger chambers and could lower compression. Also, depending on the particular head, the chambers may overhang the tops of the bores.

The Vortec heads do require their own intake manifold due to a change in bolt pattern.

NR-Paul
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Old 11-15-2007, 07:55 PM
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my block already has 327 heads came that way
my intake is a performer rpm
my carb is a performer 650 manuel choke
283 block soon to have 305 heads
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Old 11-15-2007, 10:46 PM
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I wouldn't use 305 Vortec heads. Seems they don't resemble the L31 350 Vortecs as far as intake ports and combustion chamber shape. The pics posted on this board a couple of weeks ago look more like the 350 "swirl-port" heads from the early-'90s trucks, and probably wouldn't make much power.
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Old 11-15-2007, 11:00 PM
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i was told, when i first posted the question about what heads to use, 305 #601 heads would be my best low cost choice, and i wouldn't have to drill out my intake bolt holes to mount them together.
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Old 11-16-2007, 12:02 AM
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14014416 heads from a 305 HO might also be an option. According to www.mortec.com/castnum.htm , the 14022601's could also be found on 267's, and could have smaller valves, so watch out.
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Old 11-16-2007, 08:17 AM
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Actually if your so called "327" heads have .170 I and .150 e valves along with 64cc chambers then you might be hard pressed to improve much on that. We all know what excessive compression can do nowadays, unfortunatley.

On the other hand, if your motor would be ok with the compression then the 305 heads would work a lot like the old power pack heads.

Maybe all you need is a bit of porting and a good cam. What are the casting #'s on your current heads?

Last edited by 65smallblock; 11-16-2007 at 08:24 AM.
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Old 11-16-2007, 11:41 PM
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i had the # some where. i crossed it a few times and i've always got some where between 62 - 64 327 55cc heads. i'll have to take off my covers again to get the #
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Old 11-17-2007, 09:52 AM
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Quote:
Originally Posted by stray cat
i was told, when i first posted the question about what heads to use, 305 #601 heads would be my best low cost choice, and i wouldn't have to drill out my intake bolt holes to mount them together.
I did a bit of poking around on this subject and I think that whoever told you this knew what they were talking about. If it were my 283, those are the heads I would go for.
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Old 11-17-2007, 09:30 PM
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block

hey 65smallblock you said the heads where to big for my 283 is it possible that the block has been bored to fit the 327 heads.
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Old 11-19-2007, 12:25 AM
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I was talking about performance 327 heads with .202 valves. Stock 327 heads have much smaller valves.

The valves on those 601 305 heads are just right for a 283, inbetween the two I mentioned above.

And to answer your question about boring, you cant bore a 283 enough to make it work good with .202 valves. They are too close to the cylinder walls.

Go with the 305 heads..
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