I wonder
get an intake manifold gasket and compare. here's are pix of stock 76 cosmo 13-B intake manifold (same bolt patter as the RX-4 & REPU) and a modified TII intake (thanks to Robert @rotary shack for the idea). This is a on-going project that I cant finish due to too many project cars)
Stock 13-B manifold

TII – notice that I have to cut drill new holes

welded shut orig holes
Stock 13-B manifold

TII – notice that I have to cut drill new holes

welded shut orig holes


