![]() ![]() But dont sweat it.the C code that you have is a good solid motor that will handle a lot. Hipo's are fairly rare so I would bet against one showing up in your car if it wasn't originally equiped with one. If I had to guess I'd say that whoever you bought this from slapped a 4 barrel on it with a Hipo dress up kit and passed it off as a Hipo motor. And finally a Hipo will come with a solid lifter Cam if it's got a hydralic bumpstick it ain't a Hipo. Most noticable would be the cast in valve spring pockets, regular heads don't have them there are a few other differences also but it is actually the same basic head that comes on the C code and you won't see a performance gain by using them. The Heads are also a different casting but you won't notice the differance unless you pull a valve cover. More noticable is a heavier wider harmonic balancer. The Hipo will also have a small extra counterweight that goes on the crank. ![]() A Hipo will also have a brinell tested crankshaft and will have a letter K stamped after the regular casting number, easy to fake, and again the "regular" crankshafts will do just fine anyway. The block itself is vitually identical except that it has heavier main bearing caps as this is covered most wouldn't bother to upgrade a plain 289 block and you really don't need to it will handle the HP increase well enough and putting the heavier mains on a regular block requires machining which can be expensive. Click to expand.You can't just increase the HP and have a Hipo motor the are a few things needed to "clone" a Hipo.
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