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I have an '89 W100 w/ 318 TBI. I am planning on doing a conversion to the magnum top end. I want to use stock heads and intake. I'm not sure about the drivetrain though. I know I have hollow pushrods, but not sure about the lifters. I will have to get longer pushrods, the 7.625" length. I want to use the 1.7 rockers as well, but I would guess the rods that come with that kit are stock length. Everything I have read says that I have a hyd. roller cam which would mean hyd. roller lifters, but the recommended lifters are AMC type. To me it looks like those are not roller lifters. I think I will go with the HarlandSharp 1.7 roller rockers. Can anyone enlighten me on this project? Any and all help would be greatly appreciated. Thanks.