4.3 cam spec's???

[Texis]

I have Googled til I'm blue in the face....does ANYONE have the OEM cam speciifcations, "BY PART NUMBER" for the 4.3??
I have found "code" reference specification...example; "Z" "T" etc. BUT nothing by part GM number? The problem is that everyone sells their cams...by part number!! Aftermarket OEM maker's such as Melling, Sealed Power, etc sell by PN. Used roller cams are all listed by PN....but no one seems to have the spec's on these OEM PNs?...lots and easy for the SBC, but not the 4.3?
The aftermarket is a non-issue, plenty of detailed spec's on lift, duration, etc...but GM factory spec's are not to be found. The GM Performance series (OEM aftermarket) provides plenty of detail.
I know the Astro van engine was listed as "HO" (high output) and I have located some "Z" code spec's referencing the Astro van's lift, duration, etc. But NOT by GM PN!!
Also, does anyone have a cross reference chart showing the Mercruiser spec's crossed over to the Chevrolet PNs? That would be useful as well. Mercruiser, Volvo, etc appear to like hidding their Chevrolet PN and lift, duration spec's as well!
Thanks

 

[shaun89]

"Factory 4.3L Cam Specs
* '96-'00, VIN W, w/ balance shaft
- Lift (I/E) - .415/.429
- Dur @ .050 (I/E) - .191/.195

* '93-'96, VIN Z, w/ balance shaft
- Lift (I/E) - .376/.402
- Dur @ .050 (I/E) - .183/.193

* '92-'95, Vin W, w/ balance shaft
- Lift (I/E) - .432/.440
- Dur @ .050 (I/E) - .208/.208

* '91-'93, ZR9/Z79, Syclone/Typhoon
- Lift (I/E) - .351/.386
- Dur @ .050 (I/E) - .179/.195 (Ductile)

* '90-'91, VIN Z, Astro/Safari
- Lift (I/E) - .403/.450
- Dur @ .050 (I/E) - .202/.213 (Steel)

* '87-'94, Vin Z, w/o balance shaft
- Lift (I/E) - .351/.386
- Dur @ .050 (I/E) - .179/.195 (Ductile)"

 

[K85 Octane]

just to add, my '01 s10 was vin W

does anyone know if I can use this in my '01 s10?
* '92-'95, Vin W, w/ balance shaft
- Lift (I/E) - .432/.440
- Dur @ .050 (I/E) - .208/.208

sorry for the hyjack

 

[Texis]

Shaun, thanks fo adding that...but that list contains no GM OEM part numbers, no way to cross reference. I ran across that list as well.

 

[shaun89]

oo crap, i thought i was being a hero sorry

 

[Texis]

It's terrible frustrating and having been ans SBC guy for 35 years....lack of info is tough to get used to!!!

For example; from 87-94 there have been (3) different VIN Z cam specs. How could someone buy a cam advertized as "VIN Z"....and have any confidence in what they are getting!!!!

I wish an someone from an aftermarket cam maker with chirp up! They have measured them ALL by GM PN and know exactly what the spec's are.