Pro Touring-ish Build - Need Advice

[Quick GMC]

So I have this kit from C1 Models, the 67 Camaro widebody.  I am trying to decide what to do with it. I was thinking of using the Corvette C5R kit for the chssis/suspension stuff, but I can't decide on an engine. I was thinking either the Grand Sport engine, or the C5R engine. Modern or old school? I dunno. 

[Ace-Garageguy]

I used a slightly stretched C5R frame under a radically chopped kinda pro-touring '70 Chevelle back in 2012, with a front-blown big block Chebby.

[espo]

What about the Mercury Marine engine built for Chevrolet to use in the Corvette in the '90's ? The engine had duel overhead cams and looks very exotic. If you're looking for something a little more current then maybe a tricked out LS7 engine. I really like the look of this body, but the  body lines from the top of the front and rear wheel openings are not something that I personally like but I guess it goes with the general overall look.  

[DrKerry]

Nice resin though, C1 makes some awesome products!!!!!!

[Mr. Metallic]

What about the "crossover" FI unit from the Revell 67 Corvette from a few years ago. It looks like the unit from the Accurate Miniatures 63 Grand Sport racers, but I believe it's a modern FI version.