The Shadow MK1, aka the Go Kart did not work very well. Its replacement was your standard CanAm car, big.
The Lola T160 was fairly small, the T222, as they say in devon 'Girt' (big).
The M1A &B and the M6A were both fairly tidy, the M8 a, b, c,d, e, etc were big, the M22 (Trojan M8), Big.
The little Cooper Monacos and Lotus 23s were tiny, the later cars huge by comparison.
Ferrari 350P, smae size as the P4/412P it was based upon, 612p and 712p pretty big.
It was not just the engines in CanAm that were big.
And do you really think that a March CanAm was a neat, compact design??????