Now check out this site for 347 Horsepower
http://www.ford-power.com/370-347.htm
everything in this I have accept the heads and mine are gt40 iron Fully ported and polished
Now plus my other mods
77Mass Air
Ram Air
Underdrive Pulleys
Cobra Computer
Ported and Polished Upper and Lower Intake
Off Road H Pipe
Headers
Accel Distibutor, COil, Wires
BM Electric Fan
And I am not an inexperienced poster, I have been posting here for months. Like you said you dont have much knowledge in stroker motors so how can you say the HP difference.
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347 Stroker Motor: Balanced, 30lb Bosch Injectors, Cobra Computer, Cobra Transmission, GT40 Ported and Polished Upper and Lower, GT40 Milled Ported and Polished Heads, B303 Cam, BBK 1 5/8 Headers, March Underdrive Pulleys, Electric Fan, Accel Performance Coil, Accel 300+ Racing Wires, NGK Plugs, Ram Air, K&N Filter, 77mm Mass Air Unit, FlowMaster Exhaust w/offroad H-Pipe, Hurst Short Throw Shifter, 3:55 Gears, Ram Clutch, Cross Drilled Rotors, High Tolerant Painted Calipers and Drums.