Well it's no secret that while I'm ok with the inline as a cheap alternative to the OEM at the same time, for personal reasons, I've not elected to go that route. That said here goes:
In line thermostat options. See rictek's post at
viewtopic.php?f=5&t=64333 for how to install. Be sure to add a clamp at the "upstream" end to prevent the tstat from migrating down the hose toward the radiator inlet. Also see my comments on the purpose of a small hole in the tstat skirt.
If purchasing the thermostat by vehicle - per laplaya
1968 Renault R10 All L4 1.3L 195 Degree; OE Temperature
1969 Renault R10 All L4 1.3L 195 Degree; OE Temperature
1983 Renault Alliance All L4 1.4L 195 Degree; OE Temperature
1984 Renault Alliance All L4 1.4L 195 Degree; OE Temperature
1984 Renault Encore All L4 1.4L 195 Degree; OE Temperature
1985 Renault Encore All L4 1.4L 195 Degree; OE Temperature
1985 Renault Alliance All L4 1.4L 195 Degree; OE Temperature
1986 Renault Encore All L4 1.4L 195 Degree; OE Temperature
1986 Renault Alliance All L4 1.4L 195 Degree; OE Temperature
1987 Renault Alliance All L4 1.4L 195 Degree; OE Temperature
1988 Eagle Medallion All L4 2.2L 195 Degree; OE Temperature
1989 Eagle Medallion All L4 2.2L 195 Degree; OE Temperature
If purchasing the thermostat by temperature and brand (NOTE - this list is based on cross references from several sources and is probably but not certainly correct)
195F - hotter than OEM and may improve engine efficiency
Carquest: 31179
Chrysler: T0727190
Ford Motor Co.: C7RA 8575 E
Ford Motor Co.: C7RA8575E
Gates: 33109
Mopar: 3765
NAPA: 284
Renault: 33000140
Renault: 7700727190
Stant: 13519
180F - essentially the same as OEM
Beck/Arnley 143-0024 - apparently a tractor tstat
Carquest: 31177
Gates: 33108
NAPA: 184
Stant: 13518
In hose thermostat housing cribbed from an old post by arengant for which I lack the link.
Meziere WN0072 Inline Thermostat Housing with a Chevy tstat of your choice.
NOTE install comments from an old post. Orient the tstat so the spring is closest to the block to allow the hot water to open it at the correct time. Install in the hose from radiator to OEM stat, making sure the new housing touches the OEM stat housing, you'll need about two inches of hose to accomplish this without kinking the hose. A small, ca. 1/8" hole should be drilled in the middle of the flat disk, between the outer edge and the opening itself, to allow air to escape and some flow past the tstat prior to opening to prevent temperature spikes (some report that in winter having the hole causes the engine to cool off quickly when not under load; if so simply swap in a tstat without the hole). Generally those "in line" tstats have an arrow pointing in the direction or water flow or some similar marking as to orientation but you may have to look hard