i took the valve covers off today and saw that the rockers are roller tipped i cannot identify them though.

the head casting number is 462624.

from mortec...
462624.....75-86...350/400......76cc chamber, 1.72/1.5, 1.94/1.5 or 2.02/1.6 valves

the block's casting number is 3970014

3970014....350...70-76...2 or 4 (bolt main)

they are stamped rockers and after measuring appear to be 1.5:1 (i will post pics later.

would the roller tipped rocker indicate that i the motor has a roller cam and roller lifters?

is there an easy way to tell if the lifters are hydrolic or solid without pulling the carb and intake manfold?

are the heads worth removing to port? i have a 3 week break from auto tech school so i might dig in and go all out.

i am trying to set lash, and several valves appear to be loose so i am thinking solid lifter

 

No

If there's slack in the valvetrain, it's probably solid... unless it's hydraulic and it's been lashed wrong.

 

i am thinking it is solid considering that it is a louder valve train than comparable engines and the lash is off.

what is the spec for valve lash on the 350's?

 

Lash spec for a solid cam is generally given by the cam manufacturer. Look to find more lash on the exhaust side. I would pull the intake and verify though, if you are under the impression that you have a solid lifter cam. Lots of different things come into play, not worth toasting it.

PS. I hope they didnt build a solid cam engine with go fast parts and those heads.

 

Find a valve that's closed and tighten the rocker nut down, past zero lash. Hydraulics will have a bit of "squish" in them, on the pushrod side. Solid will immediatly start to open the valve.

Obviously you will have to re-lash.

 

they are solid lifters. i dont know what the cam is, so what should i set the lash at? i have no idea...

 

You pulled a lifter and verified? Solid flat tappet cams aren't that common, especially if someone did use crappy heads like that. Usually a solid cam is used when people really know what they're doing.
Hence, I HIGHLY doubt you have a solid cam, unless you post a picture of the lifter, and you verify that there's is no spring in the top. Ie you can't push a pushrod into the top AT ALL.

You can grab a rocker and rock it towards the cam with your bare hands. An experienced mechanic should be able to tell you if it feels like there's a spring or not.

 

i both misread (another's post) and misthought my previous post.

they are hydrolic lifters for sure. i pulled it apart (intake manifold and carb and a little more) and varified that they are hydrolic. the valve train is in rough shape though and i need to replace some things (if not most) and am starting another thread on the top end build.