If there are any HP gains, they won't be noticeable to you. Don't bother with it. Unless you have money to blow for the looks of it, leave it be and save for the gears.
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1969 fast back; yellow; weld wheels; 302 roller with GT-40 heads; 3:55 gears; 5spd T-5; MSD 6AL; E-303; flows; Hedman headers; Holley 600;Weiand Accelerator;1.6 rockers
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