McLaren allowed Lawrence to build up another F2 chassis in his works and was 2nd in the SR Gold Star series in the car, and first ST driver home in the Tasman races at Pukekohe and Levin.
He won New Zealand's Gold Star Race Championship for single seaters in the 1970-71 driving the Ferrari, and then ran the full Can Am series in an elderly McLaren sponsored by Canadian interests.
This was confirmed by brilliant driving of the underpowered Dino 2.4 in the 1971 Tasman, at Levin he passed Amon in a March 701, Oxton and Cannon and was closing on 2nd placed Neil Allen, when he collided with a lapped back marker and at Levin he finished third ahead of Amon and Gardiner, but a bad crash in a new Lola F5000 at Pukekohe in 1972, left Lawrence with the Lola limp and largely ended any chance of a racing career in the United States and he did not fully recover till the 1974-75 race season driving a Lola T332 Formula 5000 car.
In the 1975 Tasman he was narrowly defeated by Warwick Brown, but for the following two season he lost his Marlboro and Singapore Airline sponsorship and his Lola 332T was less reliable, although in the 1976 NZ international series, he briefly led at Pukekohe and won at Teretonga and in 1977 a devastating drive at Oran Park, from the back of the field took him 4th at behind Alan Jones, Peter Gethin and Warwick Brown, before retiring, mid race.
[3] Lawrence competed in the 1970 Can-Am season, driving the "Spirit of Edmonton" ex-George Eaton McLaren M12 #60-04[4] to points finishes.