![]() I've messed around with a mismatched combo for a while now and I'm sick of it. I'm trying to put this all together for cheap, but I want a combo that works. I'd think the cast iron vortecs would outperform those, even with a little loss of compression (ZZ4 is rated at 10:1). What are your thoughts with this cam / head / gear combo? The ZZ4 is supposed to be 355 hp at 5,250 rpm, but that's with 58cc L98 aluminum heads. 474/.510 lift), some comp cams self-aligning roller tipped lifters that I already have (1.52 ratio), a TH350 with (perhaps?) a little more stall, and 3.08 gears. Here's what I'm thinking: the ZZ4 roller cam (208/221 duration. ![]() ![]() They are milled to 62cc chambers, were treated to a mild port job, and have 2.02 / 1.6 valves in them. The heads are fresh vortec castings re-worked by Competition Products out of Oshkosh, WI. The Plan: a hot street car that is also reliable, can take a couple runs at the track once a year, and can also make 2-3 hour road trips (to get to the lake or the drag strip). Now I'm trying to put together a sweet combo for my '71 Chevelle. I picked up a clean, low mileage 1997 vortec truck block and some re-worked cylinder heads from a friend of a friend a couple weeks ago.
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