390 vs 408

I think that this is getting a little personal. I would like to chime in and I hope that i dont offend anyone. I think, and this is just my opinion based on experience, that the 318s smaller bore may hamper cylinder head flow. The 360s cylinder bore is .090 bigger and in cylinder heads mind its a big jump. 18 cubic inches is not a big difference. It depends on what your trying to do. The truck motor spoken of previously is a good example of a 390s advantages. A 408 would be a better street/strip motor. When the bore crowds the intake valve in the combustion chamber it does hurt flow quite a bit. When a small block gets bigger the need for a better head, whether its built for low rpm torque or high rpm hp, grows exponentially. I like the low buck idea of the 390 and I think the debate of which motor, 360 vs 390, would make more power would only be settled with a dyno. I would put my money on the 360 with all things being equal. There are millions of 318s out there and can be had for pennies, why not make em into tire schredding machines! I say go for it.