Jason, I saw your other post about h/c cars, and your concern for bottom end reliability. I am one of those guys who preach bottom end build up first before you do any major mods. There will "always" be the people who have 20k miles on their h/c car with no problems. My overall point here is piece of mind, money, and safety. You certainly arent modding your car to drive like granny goose. You mod your car to be able to use the power when you want to, or when you need it. Whenever you mod the top end of your Z, be it h/c, or s/c, without beefing up the bottom end, you're running a risk. It's not necessarily that the stock bottom end is weak, but when so much added power is placed on it, it carries the burdon of supporting all that extra power. Under certain conditions, something will malfunction. It's like putting 500lbs on a cart with inflatable wheels that were designed to handle 350lbs. You can roll the 500# around on it from point A to B for a while. But it's going to break sometime before it should.
When the situation arrises, when you want your power the most, you are going to want to harness it, and get it to the road with confidence that it wont break.
Cubic inches are always welcomed but there again so it an iron block. And here comes the bottom end issue again. And the Clutch issue. There are so many routes you can take for more power. You have to ask yourself what you want the car to accomplish. Once you have that in mind, do the mod. But as with anything you do in life, do it right the first time. :cheers: