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**VictoriaHardware** · 12-09-2012, 04:14 PM

Regarding RPO Z20 Engine Conversion Equipment, this is in the 1966 Assembly Manual. It did several things-

(1) Threaded plugs were installed where the AIR tubes would go into the head
(2) Thermostat was replaced, presumably with a different opening temperature
(3) On L6 engines, the oil fill cap was replaced with a screw-on, non-vented one and a hole was plugged with a grommet
(4) It also concerns the distributor but pages A3 & A4 are missing

Name: Z20_A1.jpg
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Name: Z20_A1.jpg
Views: 471
Size: 112.5 KB

Name: Z20_A2.jpg
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So -
• Apparently ’66 was the first year for this option
• It applied to all engines for CK10, 20, 30, and P10, L6 and V8 (???)
• K19 (Air Injection Reactor) and Z20 were mutually exclusive
• There’s no indication this was Fremont-only

There’s a lot left to understand here. Not sure why this was needed.

12-09-2012, 04:14 PM	#17
VictoriaHardware Senior Member Join Date: Nov 2012 Location: Southeast Michigan Posts: 803	Re: 1966 service id label glovebox lets see them Regarding RPO Z20 Engine Conversion Equipment, this is in the 1966 Assembly Manual. It did several things- (1) Threaded plugs were installed where the AIR tubes would go into the head (2) Thermostat was replaced, presumably with a different opening temperature (3) On L6 engines, the oil fill cap was replaced with a screw-on, non-vented one and a hole was plugged with a grommet (4) It also concerns the distributor but pages A3 & A4 are missing So - • Apparently ’66 was the first year for this option • It applied to all engines for CK10, 20, 30, and P10, L6 and V8 (???) • K19 (Air Injection Reactor) and Z20 were mutually exclusive • There’s no indication this was Fremont-only There’s a lot left to understand here. Not sure why this was needed.