Anyone have a nice roller cam laying around that will work in MKIV blocks? Not looking for a stock cam, looking for something similar to a 500 efi profile if anything is out there. Has to be for mkiv with block mount fuel pump

I have a Comp Cams 11-450-8, 290HR you can have for $150 plus ride. Has 575 miles on it - was in a show car.
11-450-8 - Magnum? Retro-Fit Hydraulic Roller Camshafts

just a fyi,you can use a gen6 cam in a mark 4 or gen5 block.

I need a fuel pump lobe

the 525 efi cam has a fuel pump lobe,not sure about the other merc efi engines.

Think its just gen V that don't but you will probably find a Mark IV cam cheaper then a Gen VI.

correct on the gen5 engines as they have no provision for a mechanical fuel pump,some of the older gen6 blocks had no provision but the late model blocks and the current over the counter gen6 blocks do have a provision for the pump.as far as pricing on used cams the gen6 engine has been around since 1996 so their is a lot of used cam,s for them floating around.installing a gen6 cam in a mark 4 or gen 5 block is simple,all it takes is a cam retainer plate,two retainer plate bolts and a gen6 timing chain.

And just a fyi for our Gen V friends ... A Mark IV cam will fit in the motor with no issues its just the block don't let you use the pump lobe on the cam.