To stroke or not to stroke......

Working along the same lines, I will be rebuilding the 340 for my dart this winter. Now this all hinges on if the block will take another overbore as it is already .030" over. My plans are as follows.

another .02-.03 overbore (if possible)
360 crank turned down
aiming for 10-10.5:1 compression
eddy mag heads (will be mildly ported)
mag air gap
I'm thinking the xe 274 comp cams
700-750 cfm carb (no prefence on make)

I figure the turned down 360 crank is a cheaper way to gain some cubes.
The reason I'm going with the magnum heads is I plan to fuel inject the engine in the future and already own a M1 fuelie intake for mag engines that is on my 97 dak at the moment.

Now by my calcs, I figure I should have a very solid 400 hp possibly more.
I still not sure on the cam and would like some suggestions for this.

Thanks