You said you put RTV on intake. Was that while the intake was still installed? Just smearing it on the front where it mates with the block won't keep it fron getting blown out from excess pressure.
After its been cleaned, and warmed up good, hood up, chock the wheels, have a friend get in and hold the brake hard while pressing the throttle till just before it starts to rotate the wheels or move, and watch for blowby/oil.
Might pull the pcv valve and watch for excess blowby. If there is allot its probably going to blow out any gaskets(front of intake, front of oil pan, timing cover seal, valve covers, ect...) no matter what you do except re-ring/overhaul. JMO