Retrofit Hydraulic Roller Lifters 340

Nobody knows if the Crane's are a drop in?

P.S. Update

Crane's are a drop in:
http://www.carcraft.com/techarticles/408_inch_mopar_stroker/photo_10.html
For a camshaft, we went with a Crane solid-roller that spec’d out at 260/266 @ 0.050 inch, and 0.420-inch lobe lift on a 108-degree lobe-separation angle. It was the smallest solid-roller in the company’s catalog. Traditionally, when installing a solid-roller in a Mopar small-block, the oil to the tappets needs to be blocked to prevent the lifter waist from uncovering the gallery, which results in zero oil pressure. To block it and still feed the mains required sleeving the gallery, peening the sleeve in the lifter bores, and drilling oil-feed holes down to the mains. Crane says its lifter design simply drops in and works without all that fussing. They did. Oil pressure was 30 psi at idle and 70 psi at high rpm. As pointed out in the Crane instructions, some clearance needs to be ground into the block for the link bars.


That streetable 408 made over 600 hp!