Your need reminded me of the louvers that were on the hoods of my E Type Jags (64 & 70). They did vent some air.
Good Luck with your choice.
Jayare
A Jag guy....
They are my first love...especially the 3.8L Mark II with the four speed Moss gearbox...
Did some sedan racing with a Combs replica.
Had a JCNA national concours car with a 1966 3.8L S-Type.
1983 XJS-HE V-12, 1997 XK8 with some Arden mods...
Never knew if I'd reach my destination with the older cars, rawhide mallet better at unsticking the points in the SU fuel pump, then knocking off the wires !!!
me likey the 280ZX one..maybe you can play around with the placement a little. Place 'em closer to the middle. The Mosselman looks good. Arent you considering making 'em flush to the body?