That is a valid question. To be honest, it is hard to say, as I haven't driven this car in years! I do know what 5-600 rwhp feel like...and it is a rush! And that is the issue that I get back to...how much is enough?
Power is addicting, and like almost any addiction, we get used to it and want more. My GTO sure felt a lot faster the first couple of times out. Then I start thinking about forged internals, etc, but have managed to "just say no" [the LSx engines are fairly reliable to 550 rwhp w/ stock internals]. Now, it is a fairly heavy car, and so incredibly well built it is stone-silent at 120 mph [other than a bit of wind noise], and very muted. No one has a clue how fast that they are going until I point it out. The 'vert sure won't be in that class!
I truly wish I could just drop a 500 rwhp turbo'd 351W in and see how it feels. Maybe I'd say THAT'S ENOUGH! But that isn't safe on the stock block, anyway, right? And hence my problem.
Hopefully I will get some input on the other thread I've started, and see if I can get some input on the BB swap from someone w/ experience.
To turn this thread around, what can a STOCK 351W make w/ boost? Then to get >400rwhp, need heads and pistons, right? Stock rods? At that point, longer stroke? And of course, I assume a bit more cam? I do know that planning from the outset works a lot better than to keep changing parts.
Go ahead and inform me AND beat on me...my wife would probably tell you I need it
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