The xe seiries of cams are designed to build low end while retaining the top end horsepower of a similar duration cam,they also make alot more vaccum than a similar advertised cam.In short they make great cams for the street compared to a similar duration old school design and imo that grind should work great in a 340.The only thing that would hold you back is if your running stock manifolds-you probaly would be o.k. with the convertor but I wouldnt run it with manifolds.Aside from that cam you can have a powerful idle with a smaller cam that performs good at lower rpms if you go with a lower duration and a tighter lobe seperation,say a
[email protected] and a 108ls 104cl,such as an old school isky 264 mega cam I believe it was.