I think you would be under-intaked and maybe under-carbed with that setup, but no doubt it will make some power. FYI on the first go around with my 492" engine back in 2005 it used a Blue Thunder intake, 850 cfm Holley carb, street/strip ported Edelbrock heads, and a 306S solid cam, and only made about 540 horsepower. Made gobs of torque, though. Here's a chart of the dyno results:
When you get into that kind of cubic inches, if horsepower is your goal you need to think about a roller cam and a Victor/Dominator combination. Even if you really work over that PI intake it won't fare much better than the Blue Thunder intake, at least based on the test results I got from my book. Also, the 294S cam is way too small for a big 427 stroker. If you want to maintain the period correct look, I'd be at least thinking about upgrading to a roller cam; that will get you back 30-40 horsepower.
I went back to the dyno with the 492" engine later with the same heads, a big roller cam, Victor intake and 1150 Dominator carb, and it made well over 600 horsepower.