more stroker Qs

[XJsaabTech]

Just starting my stroker build, got a whole 4.2L for free, n was wonering

What is the duration/lift on a 4.2 camshaft?

Would swain coated pistons be worth the money?

probably been discussed before, but i couldn't find anything in search.
Thanks for any input.

 

[Dr. Dyno]

The 4.2 cam has a duration of 192* intake/exhaust @ 0.050", valve lift of 0.405" intake/exhaust, and a 114* LSA. It's great at low revs but sucks at 4000+rpm. If you want a great all round performance cam for your stroker, the Crane 753905 that I have is the way to go.