oil pressure line

[jacmac]

Can anyone give me the exact measurment for the oil pressure line that goes thru the firewall?? The AIM on page 30,31show the hole but no measurment. Page 30 says "3"-RPO U17 .5 hole at existing dimple.I tried that & entered the cowl area.At least I used a very very  small drill bit! I want to install my engine this weekend. Im adding the console guage package. 69 Z10 396-325hp any help is appreciated! Thanks

[mark x22]

look in UPC 0 A9 

[jacmac]

No measurment their either but I appreciate the pic! Thanks

[Paul68RS/Z28]

I mic'd mine at .5"

[mark x22]

it has a dimple there about 4.5 inches from the wiper motor and 4.5 from the right wire gutter hole . the car is together and hard to measure.

[jacmac]

thanks guys!!!