[aaronkl84corvett]

yes they are 290s - i've not been into the motor yet - but the previous owner swears that the measured compression with standard felpro gaskets - was 9:1 but assuming they used off the shelf parts - perhaps comp is a tad below as you suggest..

the LS6 cam is officially off the table for me - I have (what I thought was a NOS LS6 - turns out its a NOS 181 and while i'd love to build a 12.5:1 ZL1 - it ain't in the cards now - and certainly not for this monte)

i have a set of closed chamber heads from 66-67 - I think they are 206 heads from a 396 - and they have 97CC
i figured, cut em a few thou, run the shim gasket - that'd get me dang close to a true 10:1

that all being the case, they don't have the sending unit ports in them, and the intake doesn't allow for one either.

where else could I put a temp sender? that is if I want to run the factory style intake, or even the 390hp aluminum qjet intake (def want to keep it factory appearing)


i'm not afraid of a flat tappet cam - especially with GM EOS on the shelf - but a hyd roller isn't out of the question.... but I don't want to get into full roller rockers unless they fit under the low profile valve covers... i do haev a complete set of the LS6 long slot rockers - they were on the engine that teh 181 cam came out of so i'm sure they can handle the 600 lift... just not sure how good of an idea it is to use stamped rockers with a roller camshaft....
cheers

Aaron