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Old 07-16-2010, 05:04 PM
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cam question

hey guys,
79 firebird with olds 403
holley 750, performer intake, olds 350 heads-around 65cc's, accel distributer and coil, th-350 trans and 3.08 gears with 28" tires.

im going to change my rear gears to 3.73's and swap out my stock converter. the cam thats in there now is a comp 218-218 at .05" lift. Im looking for more hp and torque.(like everyone on here)lol.

what cam should I go with? im not going to be taking it over 6000rpms.(windowed mains).

and the Firebird is quite a heavy car any suggestions on converter stall?

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Old 07-16-2010, 06:34 PM
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comp cams 280H magnum, degree it in and install on a 104deg in C/L.

use 4.10's with 28" tall tires. use a 10" 3500 stall converter (th350).

recurve the distributor for 24deg base at idle,,,35deg at max advance,
(short 11 deg advance curve)

+10deg of vacuum advance at highway cruise. This requires modifying the stock 403 distributor advance curve limit. Use a Performer rpm 350 olds manifold. The stock olds distributor advance curve is not even close.

750cfm carb and headers. Shift it at 5500-5800 rpm.
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Old 07-16-2010, 07:03 PM
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thanks f-bird.
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Old 07-16-2010, 07:05 PM
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The heads can use some porting. There is big power to be had there as the stock heads are modest in as cast form.
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