i will throw in here i have liked the lift that bolts to the carb holes and lifts from the intake manifold ! []

those plates work good if a few simple "rules" are followed.
make sure first, the lift plate is well constructed. meaning, your welds are good, not some import "stick on" welds.
make sure your intake threads are good.
and finally, use quality bolts that are the right length, meaning using almost all of the thread depth of the intake holes without bottoming out the bolts. studs work better, again using all of the available threads. the shear point of a quality 5/16" bolt is way more than the weight of an iron hemi, and you have either four or eight in use.
just my experience with gen one 392's. your mileage will vary.