I've got a block that I've got out of the car and almost completely stripped. The setup is currently flat tappet, but I've been told it's a roller block.

What exactly am I looking for to verify this? There are three cast-in "studs" in the lifter falley with threaded bolt holes in them. That looks to me like where the factory "spider" bolts in.

If it is a roller block, what sort of parts do I need to convert it BACK to roller?


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"Beware he who would deny you access to information, for in his heart, he dreams himself your master"

'84 Black Camaro ZZ4 M5 (V-6 in a former life) -- street beast
'91 Medium Blue Metallic Z28 A4 (UB-HSTRY's old ride) -- currently broken
'99 Navy Blue Metallic Firehawk #120 M6 (99.44% stock) -- daily driver

 

Just a roller cam, the spider you were talking about, roller lifters, and pushrods for roller cams (difference in length)

Jason

 

There should be tapped holes on each side of the from cam bearing hole for the retainer plate (behind the timing chain gear). Also in the center of the lifter valley there should be small "towers" that are tapped for the spider. The top of of the lifter bores should be machined flat for the lifter retainers.