Thread: 327 heads/283

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Originally Posted by drofdar

I have a line on a pair of 327 double hump heads for $50. Good shape but need valve job/springs. I am wondering what they would do for a stock 283 with 600 cfm and perhaps a 30/30 solid lift cam over the stock 283 heads.

Hi,
Not knowing much about the full project but if you want to have a
strong streetable 283 I have done this with a factory manifold& 2x500
Carters and a RPM 300 solid cam/ 10/1 compression. I would suggest-
fit 110/358 springs If the heads have 1.9" inlet valves..
If the heads have 2.02" save them for later or sell them as they have
been a loss for anything less than a 4" bore as a rule..
IF you MUST have that grade of solid cam and you like screw the last
H.P out the motor with lots of searching adjustments then get a pair
of tappet covers with removable tops.They are worth the price as you
will see. I would use a Dual Plane Performer++ Inlet manifold regain


some of the vacuum this camshaft will cost for brakes etc.,..
With a 600 D.P Holley you should be looking at 300 HP @ 6250rpm..
This is as large as you need as more is of no use for streetability.
With this cam you can forget about economy.
There must be many other cams to choose from and IF I had to do
it all over again I would pick a GM Hyd 222/222* @ 50/1000" 447/447"
lift which is plenty for this great little motor to spring to life.
As one man said...That's My 2 cents worth and all the best..Skyeking..

That's great advice. I am thinking of just going with a small 4 barrel carb, perhaps 500cfm on top of an Edlebrock Dual Plane. They have one with the old style front oil fill tube, as this is a 60's style 57 Chevy. The motor runs strong enough for a street cruiser, and I will be upgrading to power brakes. I understand the 283 in stock form is light on vacuum anyway, so maybe a larger cam would only cause additional problems with the brake booster.

I wonder what a set of higher ratio rocker arms would do for this stock 283?

Originally Posted by drofdar

That's great advice. I am thinking of just going with a small 4 barrel carb, perhaps 500cfm on top of an Edlebrock Dual Plane. They have one with the old style front oil fill tube, as this is a 60's style 57 Chevy. The motor runs strong enough for a street cruiser, and I will be upgrading to power brakes. I understand the 283 in stock form is light on vacuum anyway, so maybe a larger cam would only cause additional problems with the brake booster.

I wonder what a set of higher ratio rocker arms would do for this stock 283?

Hi,
There are some stage 2 cams that give good vacuum such as 204/214* GM
and you will get more lift at the same time. Forget the Rockers this project.
This cam lives well with std Autos. S/king