Re: Opinion on upgrading interior
The Sport-R's are great looking covers/buns- very unique with the french seams & sude inserts. Striking if you pick a contrasting thread color, all that while still looking stockish.
If going for their "Sport" version (no french seams has stock welting, no-suede, but still big bolsters), i would say I prefer the legendary rallye big bolster kit better.
Regardless of which one you go with you should be prepared to add seat track extenders and possibly cut an inch or so out of your seat tracks to lower them. The foam is extremely stiff and you will sit higher and closer to the wheel than original or with stock style buns (ACI)
I've done many of these and while they do look great- just be mentally prepared for the mods that will be necessary to make them truly comfortable.
Also worth noting- If you have any broken springs, you need to fix them before recovering your seat. While these big bolster bun kits look great, they are just sitting ontop of a wobbly spring assembly... if the springs are broken its still going to feel like poop.
That last note is really the reason why those TMI aftermarket pro-series seats like the ones being discussed in that other thread are really a desirable consideration if 100% originality is not needed.
They LOOK like the TMI sport-R covers, or the plainer "Sport" covers- however they are on a modern seat with solid frame horns under the bolsters and no compression springs. They likely feel like any modern performance cars seat, while looking vintage.
If I did not have seat cores to start with, those are exactly what I would be buying.