Hi If I replace the 305 TPI in my 1989 IROC Z Vert with a L98 Shortblock and Engine Quest

-CH350GA heads, can I use the rocker arms, pushrods, roller lifters & retaining hardware from the 305 in said 350 ?

 

Yes

 

Generally yes. Or at least, not necessarily no.

However, some of it may depend on how those heads are set up, to guide the rockers. If they have guide plates, then you CANNOT use the self-aligning rockers that came on a 89 305.

Lifters you can re-use regardless, if they're still good. Push rods, maybe, if they're the right length to give acceptable rocker geometry on the new heads, of which there's no guarantee. Not sure what you mean by "retaining hardware".

 

Thank you both. By "retaining hardware" , is there not metal brackets ("spiders" ?) and bolts that retain and/or aline the roller lifters in the block? That would be what I am referring to.

 

Yes all of that will transfer over, assuming your 350 is 87-up, and was fully equipped from the factory for it. Lots of those blocks, esp in L05s which didn't get roller cams, had the cast-in provisions for all that, but they weren't fully machined. Obviously this isn't related to the heads or anything about them, strictly the block. Also, there were 2 different cam retainers, which are exactly the same except different: the screw spacing is different. I have no idea how to tell which one is which except to install a cam retainer to your particular block and see if it fits; and if not, get the other one that does.