a 347 will fit anywhere that a 302 will.
A 351w will not fit usually in small chassis cars (maverick,comet, early mustang, falcon, etc...without a lot more mods. In those cars, usually a 302 based engine is a lot less headache. Even the same can be said for a FOX mustang. 351w doesn't fit as well in a FOX as a 460 does, and since they came factory with 5.0's, a 347 is a natural and very cost-consicious way of increasing HP/torque..without having to buy new headers, pan, mounts, etc.
And...a 347 usually uses really light pistons and relatively short rods...less weight..and every one that I've driven (even the ones with 'heavy' parts) rev VERY quick. Cant' say the same for a windsor...the crank alone in a 351w is very heavy with the 3" mains and large counterweights.
"it is better to appear ignorant than to open your mouth and remove all doubt"--Mark Twain
<font size=-1>[ This Message was edited by: mavman on 5/24/06 12:06pm ]</font>