different then stock to to the 110 center, with ever so slight rump, while the stock is very smooth. The stock cam will be smooth strong power from 800 rpm to 4000.
The XE256 will also pull from 800 or 1000 rpm to about 5000, and by about 1800 or 2000 rpm, the tighter 110 lobe center will make MORE midrange power/torque than stock which will be noticable. And top end will be about 5 to 10% (read that + 15 to 20 HP over stock) but will not be that noticeable because in street driving you never get up that high. Should run well with the XE, but the faster valve ramps "may" make more valve noise to a trained ear.
Depending on car and gear, 268H, 270H, or XE262 are all possible (or 270S). If gas mileage is an issue, stick with either stock GT or the XE256.
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1967 FE 390GT engine: 416 CID 233/238* @ 0.050 Solid Lifter w/ 4 spd TL.
1968 GT/CS Mustang. 289/c4
1995 Mercedes e320 I6 DOHC, 216 HP wagon.
2003 Tundra SR5, 4.7 DOHC, 4x4.
Another Galaxie (one day.)
Oh and a Bicycle - daily driver to save gas for the 'F'un 'E'xcursions.
