What intake manifold can I use on your Small Block Chevy's with the aluminum heads?

BluePrint Engine's SBC aluminum cylinder heads are dual tapped to accept both pre-1985 12-bolt pattern and the Vortec 8-bolt pattern intakes.

BluePrint SBC Engines 350 to 400 CI are dyno tested with our BPE Dual Plane Aluminum Vortec style intake: 

https://blueprintengines.com/products/blueprint-engines-sbc-intake-manifold-kit-vortec-heads-dual-plane-natural-aluminum?_pos=1&_psq=BPP350V&_ss=e&_v=1.0