what des it take to stroke a 360 to 408?

Your $4,000 360 is better than blueprint engines stuff.

I know my 340 cost a little more but has better bearings, a old forged crank. No Chinese parts like crank and rods.

You need to tune and wind that 360 up. A 10 inch converter would be a start and you feel it. My tci streetfighter 10 inch feels pretty tight and is very felt on each up shift. A shift brings the rpms down to only 4,000 above the rated stall speed of 3,000 yet the torque increase is very noticeable over the so call high stall 340 converter.

The avs carb once jetted correct, and it should be close if not right on with manual choke 750 specs, should have the air valve secondary flap adjusted lighter until a bog. This is were the 10 inch 3,000+ stall converter lives. That spring can be adjusted pretty light now and the motor will make more hp.

So, 3.91 gears, a 10 inch converter and adjusting the secondaries to open faster should be a nice improvement. Then if you are still not happy go for the storker. Expect I might use 3.55 gears with a 408.

Too bad this cost $$