Re: Technical differences L/88 vs. ZL-1
Nuch,
Sounds like you got all the facts nearly right… suffice it to say the late ’69 2nd design L88 engine was virtually identical its ZL1 aluminum block counterpart. This includes all internals (camshaft/crankshaft/pistons/rods) with the ZL1 having additional bosses for extra bolts to hold down the head. Most people believe the ZL1 was significantly different than the L88 in addition to its block material because it was indeed an improvement in many details from the earlier 1st design power plant.
Like the ZL1 the 2nd design L88 utilized the 4296 double-pumper; earlier L88s using the single-pump 3418 and 4054. The ZL1 also required the use of the K-66 transistorized ignition system (tach drive distributor), designed for the Corvette and borrowed for use with the Camaro. This was the only distributor dialed in for the full race camshaft.
Any other differences between the 2nd design L88 and the ZL1 are unknown to me; I’m sure someone will pipe up…
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