ZZ4 crate motor
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Joined: Jun 2002
Posts: 538
Likes: 7
From: Johnsonville Wi
Re: ZZ4 crate motor (Hall1836)
The zz4 has L98 heads, the TPI should work. Sounds like you may really want the 12561723 zz short block assembly because you'll have to toss the supplied flexplate, the supplied HEI, the long style water pump and the intake manifold. Probably the pan too, and you already have an electric fuel pump. This assembly comes without a cam, but the ZZ4 cam is lazy (don't get me wrong, the motor is great but runs out of steam about 5500 rpm, due to the cam), and for the about $1600 savings, you can get the GM HOT cam and roller rocker kit or a better cam from Comp or Crane and be at 380 or more HP with a thousand to spare (subtract cost to put in the cam if you have someone else do it). According to my latest Pace catalog, you still get the 12 mo / 12,000 mi warranty on Full or Partial engine kits, but like most warranties, they start on date of sale. So if you don't get it in and running promptly, the warranty runs out pretty quick.
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