Re: cam from 302 fit a 351w?
Still no answer if this is a roller or not, but I am assuming it is a flat tappet cam...
1) Used cams must either get new lifters or be matched to the individual used lifters that we previously used. This means the same lifters on the same lobes.
2) Installing a cam where you don't know the lift and duration is asking for trouble: broken valve springs and/or valve/piston contact. You may get lucky; you may not.
3) Bigger engines need bigger cams. A wild, not street friendly cam on a 302 may act mild on a 393. Always be sure to check for piston to valve clearance and valve spring compatibility. Do you know what pistons are in the 351? Flat tops vs dish makes a huge difference in how much lift you can handle.
If this was a mild 302 cam, chances are you won't run into serious issues; as the others state it will fit and may change the firing order. It may also be a bit disappointing on a larger engine.
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