Are ls1 lifters and lt1 lifter the same?
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Hate to argue here, but they are the same lifters Nate, they are all just standard SBC lifters, all you gotta do is go look in any camshaft catalog, and they will list the same part nymber for both. For instance in Comp Cams catalog, check pages 86-89, and you will see that they both have the 850's listed, and for the promag's LS1's also list 875's , they are the same in the 4.3's we use them all, in our motors, 4.3 vortec/LT1/LS1. So you can go ahead and use any SBC hydraulic roller lifters in there, but i recommend the 875's.