Yes, unrivaled throttle response amongst other things, individual tune-able runner lengths to compensate for differences in intake runner lengths and port shapes...and so on
That's the reason why you see those old caliope setups, heads back then had drastically different flow characteristics between the longer and shorter runners (BBC heads) and they used long and short stacks. Nowadays with modern heads, equal length stacks are used most often.
That big ass 2.9" crower injector won't fit under any hood, yeah maybe a 10"cowl hood LOL
That empty block, is it a good core or a wrecked block?