1/26/2024 0 Comments 1970 lt1 350 cam specsJust my two cents, and only because you asked. If you want to spend the first hour or so each weekend tuning and figuring out which plug is fouled, adjusting lash and worrying about wiping a lobe, put in the 754. If you want a little more, go with the 140, but beware, you will spend more time fiddling with it to keep it right. If you are wanting to enjoy the car for many trouble free miles, go with the 178. I can't imagine running the 754 regularly on a street car. Pulled hard to 8,000 rpm with small diameter long tube headers. Put a 140 cam in a buddy's 68 z in 1970, with the 142 springs. I have personal experience with both, many years ago. The 754 really does not have sufficient vac. The 140 barely has sufficient vac at idle for a street car with power brakes. Still pulls strong to 6500, and you are highly unlikely to exceed that on a regular basis if you are driving this on the street. I am obviously in the minority here, but.
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