Okay guys need some help. Starting to get overwhelmed with options. Building an engine for a C6. Car is an LS2 car with 160k so motor is a bit tired. End goals are around 650-750 rwhp with either a blower(A&A / ECS) or turbo depending on what Huron Speed comes up with this year. Have easy access to E85 so that's what I'll be running. Probably going to be using a K1 crank and wisecos but don't know if I should do a 4" 402 stroker or just keep it stock stroke? LS3 heads or have TEA port my 243's. Seems like they get good #s out of them. Would like something to make good power that I don't have to review to the moon but I've heard that strokers have piston rock issues and pin locations higher than desired for ring land thickness. Have read a ton of threads but wanted to know the thinking in 2017.

 

Stock crank is plenty strong, Stock stroke equals better rod ratio
& stronger/longer forged pistons VS Stroker, let the blower do the work,
Spend the money on great heads MMS 235s with the NFI exhaust
port. 10.0:1 Comp, Magnuson TVS 2300 Blower, or turbo, 14 lbs boost, &
mild cam = 800+ @ the crank all day long! The best heads possible
means more power with a smaller cam and less boost. A much
more fun to drive car, MORE OFTEN! Mild mannered till you
put your foot in it . Check out the 416 with MMS 235s with
Blower in the dyno results section for a blueprint.

 

That looks like a great build! Probably a bit out of the budget though. I can spend probably about 5k on the long block not counting cam, gaskets and all that misc. Basically 2500 for rotating assy, 1500 on heads, and 1k or thereabouts for machine work. Looking for the best reasonable blower ready combo that I can still drive for a few months before I add the blower.

Here are my options.
1. Build my LS2 with stock crank and forged pistons/rods. Have TEA port my 243's and put in a good cam.
2. Same as above but use a 4" crank making a 402 which may be more fun before the blower
3. Either of the above combos with stock L92 heads
4. Pick up an LS3 block in either stock or 4" stroke. I was initially leaning this way but if I'm planning on boosting then I don't really see any real difference between LS2 vs LS3.

 

I would go with the stock stroke LS2 with LS3 heads and top it off with an LSA blower. The used LSA blowers can still be found cheap and you can piece together the rest of the parts pretty easily and affordably as well.

You don't have to get all crazy with the bottom end for 750hp. A shelf set of Wiseco pistons and Scat I-Beams would be fine. I've seen them hold up to 900whp easily. Just have the machine shop set the clearances for a power adder.

 

The lsa blower would be perfect if I had anything other than a C6. Unfortunately the steering rack is where the blower pulley need to be so that's a no go on a Corvette. Otherwise the LS3 top end would be a no brainier. Wife drives a cts-v wagon with a Lingenfelter kit so I do love me some lsa torque.

However if you compare L92 flow numbers to a set of ported 243's by TEA the intakes are similar, maybe a touch better in the mid-range for the 243's but the exhausts are much better so I'm thinking they might be better especially since I won't have piston clearance issues or any bore shrouding like the L92's.
I'm still split on the stroker idea.

 

Check out Olson Kustom Works. They make a kit that lets you use the blower on C5/6 Corvettes. This knucklehead used them on his C5: