I have been stacking parts, for this build, for a long time. If my mistakes can help others...
It is best to just save money and build an engine all at one time rather than stacking parts for years, hoping to, one day, have a complete engine. Believe me, I understand the whole "wanting to see progress" thing. Here are a few thoughts about why this is a bad idea:
Technology Changes Constantly
A perfect example, just a few months ago, when I bought my Oliver Big Block Max Series rods, that was the best Oliver rod available at the time. I see that Oliver now has the Big Block Max Plus Series rods, which apparently are rated for higher horsepower applications. I wouldn't have hesitated to spend a little more on the upgraded set, because I have plans to upgrade my blower at some point.
Cylinder heads are a perfect example of exactly why you shouldn't buy a new castings until you need them. Port designs evolve constantly as well as manufacturing technology. The Dart 320s, for example, flow way better today than castings from years ago.
Learning Curve
I actually started my build before I even owned my boat. I figured that i had to start somewhere. I bought my 4" Crower crank in 1999. It is a 6 counterweight, non-twisted forging, 4340 crank. At the time, I was building an engine modeled after what my friend built for the previous owner of what is now my boat. I was unnecessarily concerning myself with things like rod ratio and such. A 4" stroke made sense back then.
Now that I know more about jets, I would have opted for a 4.250 stroke. A bigger and heavier boat needs a bigger impeller to launch. You have to make big power to turn a jet pump impeller high RPM. I don't want low-end, but power at a lower RPM (compared to a car) that corresponds to the requirements of the impeller.
Depreciation
I have seen many people work very hard to buy a lot of expensive parts and store them for years. Then some life changing event forces the sale of said parts for pennies on the dollar.
I have found that, the longer things sit around unused, the more they degrade. These last few months, I have been cleaning house at my shop in preparation to move in my CNC mill. I marvel at the money that I just threw away because stuff degraded beyond use.
One way or another, it's costing you to store whatever it is that you are waiting to get around to. I bought an '89 3500 because it had a 454 and a Doug Nash overdrive. I figure, I could have purchased four overdrives (new) for what it cost me to store that truck.
If you are not enjoying what you are working so hard to pay for, it's not worth buying. "Things you own end up owning you" Tyler Durden.
Cheers,
Joe