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Old 03-26-2011, 11:12 PM
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66 Corvette 327 or 80's 350

Im trying to decide which is a better base
For a build
Currently i have a 350 sb and the following parts for it
0.100 dome pistons 030
Forged rods
Comp cams xe262 cam and lifters
Feulie heads
Performer intake manifold and a 750 cfm jet vaccume sec's

Now im wondering i have to get the block bored 30 over for the pistons
I have. Which is 400 all said and done
Or i can buy a 66 vette 327 shortblock for 300 dollars
Which is the better base to build off and would all my parts for
The 350 work on the 327 ??
It has more stock hp than the 80,s 350 i found out
And the same 4" bore
Would my pistons / cam / heads etc
Work fine on the 327 im just trying to reach 400 hp


Thanks in advance this is my first build

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Old 03-27-2011, 12:02 AM
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Everything will work except the pistons and I think the 327 has smaller connecting rod journals than the 350 too. If you're doing a complete rebuild then stock hp is irrelevant and it would be better to go with the 350. If the 327 shortblock is in good shape and you plan on using the shortblock then use it. Generally speaking though, a 350 is going to make 400hp easier than a 327 will.

I don't think you're going to hit 400 hp with the cam and heads you have though.
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Old 03-27-2011, 12:08 AM
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Any suggestions on cam and heads for that combo?
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Old 03-27-2011, 07:16 AM
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1.21 giga-watts???!!!!
 
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You will probably be around the 375-380 HP mark with the heads and cam you have now. Easy thing would be slap some Vortecs on it and enjoy your 410+ HP 350.
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Old 03-27-2011, 07:21 AM
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My choice would be the 327 hands down as 350's are a dime a dozen and if it's a small journal 327's can be reved to 7000 rpm all day long.
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Old 03-27-2011, 11:24 AM
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Quote:
Originally Posted by Shaker455
My choice would be the 327 hands down as 350's are a dime a dozen and if it's a small journal 327's can be reved to 7000 rpm all day long.
Why should it matter if they are a dime a dozen? From the outside they look identical and the extra ~25 ci just means it's going to be easier to reach his horsepower target.
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Old 03-27-2011, 11:37 AM
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Quote:
Originally Posted by Blazin72
Why should it matter if they are a dime a dozen? From the outside they look identical and the extra ~25 ci just means it's going to be easier to reach his horsepower target.
327 can rev higher and are more desired than a 350...espically in the Vette.

No pun intended if you have a 350.

If you look back 327's were making just as much power if not more than the 350's of the time.
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Old 03-27-2011, 11:39 AM
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Quote:
Originally Posted by Canuckcamaro
Any suggestions on cam and heads for that combo?
A nice set or Dart or E-heads would be fine to hit your target and a decent roller.
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Old 03-27-2011, 12:57 PM
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1.21 giga-watts???!!!!
 
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No substitute for cubic inches. Go with the 350. Who cares if a 327 will rev to 7000? Where you gonna rev it that high? Street driven car? Take the low rpm torque any day. A 350 can rev to 7000 rpm with the right valve train also. Easy decision. 350 hands down!

Besides, this engine isn't going into a "Vette. The engine is out of '66 'Vette. Notice the OP's screen name?
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Old 03-27-2011, 01:09 PM
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im partial to the 327 because i grew up around em.they still got it! but sure a 350 can put out a little more for the buck.if rpm's is what you like,id go with a nice stout 327 or even a 283.mite even be a little more fuel friendly.but your 400 hp goal could be done with either engine with some better heads and a comparable price on either one.the vortec heads are dang good for a street engine and not too pricey.
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Old 03-27-2011, 05:29 PM
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Used heads off a newer 350 vortec engine from a truck will work?
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Old 03-27-2011, 05:39 PM
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Yes. Just make sure they are actually Vortec heads and not earlier centerbolt heads. Others here can give you casting numbers to look for. Or you can check out Summit, Jegs, Scoggin Dickey, etc and order yourself a brand new set. Make sure you use an intake designed specifically for Vortec heads.
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Old 03-27-2011, 06:42 PM
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1.21 giga-watts???!!!!
 
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You want heads where the part # ends in 906 or 062. Those are the good ones. Like blazin said, make sure you get a Vortec compatible intake. Edelbrock makes one in the RPM model.
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Old 03-28-2011, 09:47 AM
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Would comp cams 268 be better for me than the 262xe ?
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Old 03-28-2011, 09:56 AM
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Very little difference. 268 is the biggest you can run with a stock stall converter if running an automatic. The 262 is right on the edge of the lift capacity of the Vortec head, 268 is above it. To be safe you should do either the valve guide boss modification or install Comp beehive style springs.

If you really want to open your eyes to how foolish the nitpicking over this cam or that cam is, go to CompCams website. They have a chart that shows the different power curves of the various XE cams. There is no difference in peak HP and TQ numbers but the entire powerband gets moved up 100-200 rpms.
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