My old 302 with a bone stock bottom end made somewhere around 280 at the wheels. Never had it dynoed to back those numbers up just a guesstimate. I'm hoping my 347 will make 400 at the wheels. That is with a stock block. When I say stock I mean came stock in a 69 boss mustang But it is a pretty radical combo for street duty and more engineered for the strip.
This is at the flywheel. My 302 made 421hp at 6500 at 386ft at 5000. With a 88 short block and 68 4v 302 heads 49cc chamber. 1.94/1.60 valve Port and polished as much I they could go. I have 10:5:1 compression. A cobra Intake ported with a 2" spacer and Holley 750DP. Luntia cam Vavle lift .526in .530ex. Duration @ .050 221in 232ex. Lobe separtion 111. When I have anough money and time. I going to freshin this motor up but bore it .030 over and deck the block some. I dont know how much horse power that would come out to at the wheels.
I personally don't find salty's numbers to be all that far fetched.
With 408 flyweel and the 15% loss that's around 340 to the wheels or so, why exacty is that so unreasonable? There was a guy earlier that claimed almost that on p heads, and i didn't see you guys reaming him.