The entire tire width looks too thin, IMO. With the amount of offset on the rims, the tires should be wider. Even the rims should be A BIT wider, but not crazy wide. If that makes any sense? heh

The plug wires actually go into where that white part is (distributor/coil pack) on the top part of that image you referenced. And as far as the ITB's, yes. In that image, those are a style of ITB's (individual throttle bodies).

Here's a few more images I found you can use for reference.

https://bringatrailer.com/wp-content/...ine_resize.jpg

https://japanesenostalgiccar.com/word...0_hakosuka.jpg

https://nzeder.net/blog/wp-content/ga...s20engine9.jpg

If you need any more help with anything car related, please feel free to hit me up. I'm HUGE into cars, and love anything and everything that has to do with them. I'd be more than happy to point you in the right direction.