I just picked up a mustang to kill for driveline pieces for my '55 pickup. The engine runs STRONG,has aluminum rockers,solid lifters,edelbrock intake and a 780 leaker. Supposedly it is a 347 stroker;been thru several owners. How can I tell if it has a stroker crank without dismantling the engine? i'm going to switch the pan,so it will be open;what should I look for???????????
Stock 302 has a 3.00 stroke, while the 347 has a 3.40 stroke. You should be able to tell with the pan off.
61falcon is correct. All 347's need to have the bottoms of the cylinder bores notched for con-rod bolt clearance. If the pan is off, and the rod-bolts have clearance notches and nearly touch it is likely a 347. The other common 302 stroker is the 331. It has a 3.25" stroke crank. It's a .030"over/3.25" stroke combo. They don't need to have the cylinders notched if they have I-beams, but may need them notched if it has H-beams.
My 347 scat crank sez "scat", also look for capscrew rod bolts and rod much stouter than the stock units. The engine may have a girdel and its easy to measure the stroke with the pan off. "
I am sure there are a few ways to get a rough stroke measurement with the pan off, knowing the different strokes for 302, 331, and 347, it should be reasonably easy to figure it out. Maybe a magnetic stand for a dial caliper as a reference point,,,,
Read this article, I do some writing for Fordmuscle.com: http://www.fordmuscle.com/forums/engine-articles/485052-easy-cid-measurement.html. Use the same method to figure out whether you have a 3.00" stroke-302, or a 3.4" stroke-347.
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