thebufenator

So after I purchased an EWP, I was told I no longer needed the LT1
style timing chain.

So I bought a cloyes timing set, way cheaper.

Well I was preparing for my top end build, and just realized taht the 93-94 style opti's have the splined drive that mates with the cam sprocket.
The cloyes doesn't have that.

Am I correct in assuming that I now need to delay the build *again* and go find an LT1 cam gear?

mdenz3

That or convert to a vented Opti.

mdacton

no you need to get the newer style opti or run a different timing set.

I would go for the vented opti and use the double roller

thebufenator

Do you know where I can purchase just the gear from?

Summit and others only seem to sell the LT4 extreme duty set.....

thebufenator

vented opti......
Is there someplace to buy the vaccum stuff and timing cover from?

mdacton

you can find the cover used

I think you can still get the vac. harness from the dealer

mdenz3

You would need to buy the cam gear from the double roller non-vented opti timing set. It probably cost the same to just convert to a vented Opti.

thebufenator

so do I need the vented opti wiring harness?
gmpartsdirect has it....for $113......

SS RRR

I've never seen this question asked or answered before, but why can't the cam timing gear be machined for the splined shaft? Can't cost that much to use a smithy on it?
.... or would that jeapordize the integrity of the cam bolts due to lack of material? I'm not familiar w/ the splined setups...

thebufenator

the splined setup has a tighter diameter then normal.

The Engineer

I would just convert "everything" to 95 and up configuration w/ vented Opti. I'm sure you'll like that better, once you've done the upgrade.

WD

shoebox

You can get a vented opti harness from Casper and a couple other places for 1/3 of that.

Injuneer

Illustrating what "thebufenator" pointed out.... you can't machine a large hole to turn it into a smaller hole.

SS RRR

I always thought the hole on the cam gear was relatively the same size as one which used a dowel. I learnd'd sumthin!