The High-Flo TPI intake has larger runner (round) and intake (rectangular) ports than the stock TPI intake base. Some measurements are:
Stock Base runner ports =           39mm diameter (1195 sq m
m)
Stock Base intake ports =           29mm X 44mm (w X h) (1276 sq mm)
Edelbrock Base runner ports =           41mm diameter (1320 sq mm)
Edelbrock intake ports =           29 X 48mm (w X h) (1392 sq mm)
ZZ4 (Vette L98) intake ports =           31mm X 49mm (w X h) (1519 sq mm)
Original intake port size - Width
Original intake port size - Height
Original intake port size - Length