Toyota LMP1 star Conway ousted Stroll from the top of the times just over 20 minutes into the one-hour session on Friday morning with a best time of 1m36.865s aboard the #31 Cadillac DPi-V.R.

That demoted Stroll and the #38 Jackie Chan DC Racing Oreca LMP2 to second place, 0.181s behind Conway and a tenth ahead of Tristan Vautier in the #90 Spirit of Daytona Cadillac.

DTM champion Rene Rast put the best of the Joest-run Mazda DPis, the #77 car, in fourth place, while the sister #55 machine missed the session due to an engine change.

Filipe Albuquerque made it three Cadillacs in the top five in the second Action Express machine.

The two cars that will start from the front row on Saturday were seventh and eighth-fastest, with Graham Rahal in the best of the Team Penske Acura ARX-05s leading Jordan Taylor's Wayne Taylor Racing Cadillac.

Fernando Alonso was 16th fastest in the #23 United Autosports Ligier JS P217, 1.930s off the pace and two places behind the sister #32 car that suffered a puncture while Bruno Senna was at the wheel.

In GT Le Mans, Joey Hand led the way in the #66 Ford GT with a best time of 1m44.602s, 0.057s up on Gianmaria Bruni in the best of the Porsches.

The class pole-sitting #3 Corvette was seventh-fastest ahead of the two all-new BMW M8 GTEs.

Fastest in GT Daytona was Porsche driver Matteo Cairoli in the #59 Manthey 911 GT3 R, four tenths clear of Jeroen Bleekemolen's #33 Mercedes-AMG GT3.

Final practice results (top 10):

Pos.	No.	Driver	Chassis	Time	Gap
1	31	Mike Conway Eric Curran Felipe Nasr Stuart Middleton	Cadillac DPi	1'36.865
2	37	Robin Frijns Daniel Juncadella Felix Rosenqvist Lance Stroll	ORECA LMP2	1'37.046	0.181
3	90	Matt McMurry Tristan Vautier Eddie Cheever III	Cadillac DPi	1'37.118	0.253
4	77	Oliver Jarvis René Rast Tristan Nunez	Mazda DPi	1'37.178	0.313
5	5	Christian Fittipaldi Filipe Albuquerque Joao Barbosa	Cadillac DPi	1'37.283	0.418
6	22	Pipo Derani Johannes van Overbeek Nicolas Lapierre	Nissan DPi	1'37.457	0.592
7	7	Helio Castroneves Graham Rahal Ricky Taylor	Acura DPi	1'37.649	0.784
8	10	Jordan Taylor Ryan Hunter-Reay Renger van der Zande	Cadillac DPi	1'37.677	0.812
9	6	Juan Pablo Montoya Simon Pagenaud Dane Cameron	Acura DPi	1'37.835	0.970
10	2	Scott Sharp Ryan Dalziel Olivier Pla	Nissan DPi	1'37.874	1.009