The ZL1 didnt come to mind at the time,but I dont think I've ever seen a good pic of one either.I have an L88 for my 68 Camaro.
I did come across a Ebay seller that can make the decal,so I may go that route.
L88's speak for themselves... 
.. you don't need no damn sticker..
I dont know, It ONLY has 430hp @5200......and its old Horsepower also.
From everything that has ever been written about L88/ZL1's, the horsepower is well above 430.. especially with headers to let it breathe. Chevy rated the L88/ZL1 engine at 430 (5 hp below the Tri-power solid lifter version of the 427) .. I suspect to discourage orders of the engines by the 'typical buyer'... Only the most informed racers knew of these engines at the time... ...with headers and supertune, I doubt that 500-550 hp is out of line..
My comment was tongue in cheek..
I have done a bit of research the last couple years on the L88/ZL1 also.Theres not alot of info out there on these.From what I have come up with and having seen a couple dyno charts on them,they are quite impressive.GM as you stated wanted to discourage sales to the inexperienced and also due to the scutiny from the insurance companys they kept the HP rating lower.GM could not mis-state it for obvious reasons.Whereas the 427/425 and 427/435 engines were peak hp ratings they used Approx 1000 rpms below peak rating on the L88/ZL1.(430HP@5200) The dyno chart I seen on the L88 (1967/1968) with headers and good tune produced approx 557hp@6400.The ZL1 produced 585hp. As you may be aware in 69 the L88/ZL1 had a redesigned head/pistons with open chambers, venturi ports which breath better and a change to the camshaft which would account for the increase although the factory rating was not changed.
IMO the second design L88/ZL1 was pinnicle of success for Chevy.By todays standards maybe not so much,but going back to the late sixtys and to see how these were beefed up.7/16 pushrods,7/16 rod bolts using Boron steel with ground shanks,etc.According to my old info the L88 with a valve spring change (which I have done)the Redline is 7600 for drag racing and 7200 for Circle track(like Daytona).I paid $4500 for my L88 engine in 1982.
I think it quite fitting that it be nestled into my 68 RS/SS
My Camaro will be stock looking on the outside.I dont expect the project to come to fruitation for 1-2 years.After this project is complete,I may build a 496 bb engine as a spare.
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