Here's some pictures from Silverstone, England "Wills Sport Car Trophy'' event; March 27, 1967
https://www.ebay.co.uk/sch/m.html?item=223995714290&_ssn=lemans_33&_osacat=0&_odkw=&_from=R40&_trksid=p2046732.m570.l1313&_nkw=gt40&_sacat=0
I can't tell on P1001, but interesting AMGT-2, P1009 & P1021 all have the BRM wheels already early in the 67 season.
jim p
The 1001 engine photo shows the BRM wheels too