...Having a B2Z myself...
I'd keep the emblems.
However, since this isn't about me...this is YOUR vette, and it sounds like you rescued it and restored it to your liking...and if you like the sleek look...GO FOR IT! (but keep the emblems)
Who knows, you may change your mind later and want to put them back on the 78SA! I think they look classy. Besides, you'll still have the emblems on the steering wheel and shifter (unless you've changed those too, for the total sleeper look!)
I voted "take 'em off".
Good luck with your plans.
Heidi
Tony: The Silver Anniversary package was available in 1978 which included the special two-tone paint scheme, aluminum wheels and sport mirrors.
All 78s have the 25th badges. The Pace Car was to commemorate the first time pacing the Indy 500 while the SA was an afterthought (IMO) to commemorate the 25th year of vette production.