Manifold..harrop

[mr j-man]

at which stage of an engine would u need to run a hi rise single plane manifold??

[Boonz]

once you start getting into the solid cam range

[mr j-man]

what about a stroker engine (355) with a mild hydraulic cam?

[GRPABT1]

Nope. High rise means revs. Big revs will come with a big cam (and all the other associated requirements like compression). Torque Power now do a high rise dual plane manifold which is getting rave reviews from alot of engine builders using decent sized hydraulic cams, perhaps give it a try.