You can either save your original engine, or sell it to help offset the costs of the new engine. The new castings are generally somewhat lighter in weight. Your crank would have to be polished.more shop time and labor.Ī new crate engine also takes advantage of modern casting techniques and is very high quality, not that your original engine isn't. New heads are a good idea either way you decide to go.a lot of money spent on your existing heads is better spent on new aluminum ones. You have to assume your block needs to be bored out.lots of machine time and labor plus new pistons.not cheap for quality work. If you add new heads and a cam, your lower rotating assembly is still old and has some wear, so you won't get the maximum potential out of the buildup, unless you rebuild the entire engine. The entire engine is no stronger than its weakest parts. I'm not saying you can't get a 385hp engine for $3200, but that's probably a lowball figure, unless you do your own work and have access to a machine shop. You can buy them in many power levels, plus they have a warranty on them. On a dollar for dollar basis, a crate engine is the way to go.
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