Alright, ive been searching for a while on a clear answer to my retroit fit a ZZ4 roller cam into a non-roller GEN I block (which has the provisions for one). I have roller lifters from a 305 roller block with the spider. I called a dealer and they cant really help me. I found something on Ebay and was wondering if this is the sort of thing im looking for.

Ebay thrust plate

BUT I searched that P/N 3100TB in summit racing and found something that looks different (shows no plate, just the thrust bearing).

Summit Thrust

So i'm still friggin confused.

Does this thrust bearing ride between the plate bolted to the block and the timing gear? (Im guessing cause the oil pump would be sucking the cam into the block).

If so, i'm guessing I need to modify my stock style replacement timing gear or buy something else eh?

Also, the gear on the camshaft doesing appear to have been pressed on, so that means I need to get the melon timing gear from the dealer right?


THANKS IN ADVANCE!!
Ken

 

Why not just get a retro roller cam?

 

http://www.compcams.com/technical/Ca...106-07/324.pdf

Of course a dealer can't "help you"; all they know is, how it came from GM. That's not in their contract. Even if they knew anything else, they couldn't tell you anyway, because GM forbids them from doing so.

If you have a late-model roller block, all you have to do is get the retainer plate and screws from GM (or out of a junk block). Be aware though, there are 2 different plates, with different screw hole spacings, to fit different blocks. Just one more way the factory porked the pooch on their "system".

Yes the oil pump sucks the cam into the block, by way of loading the distributor gear, which loads the cam along its axis.

The sprocket on the cam IS NOT pressed on; it bolts on with 3 bolts.

The sprocket on the crank IS pressed on; it requires a puller to remove, and can be put on either by pressing, or by the gentle use of a BFH and a brass drift.

This 3100TB thrust bearing is for blocks without the factory roller setup, although it looks like it would work in roller blocks as well. It bolts on the block, behind the cam sprocket. Note on the Comp catalog page that it says "minor machining required". This refers to drilling the holes for the 2 little screws, and machining out a bore in the back of the cam sprocket to accept it. The bearing is .142" thick, so I would guess, not having read the instructions, that the cam sprocket would want to be bored to about .135" or so deep to accept it (enough that the sprocket itself was held just a couple of .001"s off of the block by the bearing). Usually when I use these I just buy the timing set with the bearing already included.

Not sure what this has to do with the melonized distributor gear?

Not sure how this thread is "official"?