Or possibly the XB-70 if that is the big thing referred to...
Ah, sorry, I have a blind spot for those unfortunate airframes bereft of propellers.
I didn't know about the shared developed between the CL-84 and C-142.
There wasn't any real technology sharing going on. The DPSA was about avoiding duplicated production efforts between US and Canadian aerospace firms. (The Defence Development Sharing Arrangement was separate agreement meant to give Canadian industry access to US technology but, as far as I've been able to tell, had no effect on Canadian tiltwing design.)
Since LTV had the lead on their 'large' tiltwing design, Canadair abandoned development of its equivalent (the CL-64 which used up to 8 engines in pairs). Instead, the Canadair team under Karlis Irbitis focused on smaller tiltwing designs -- the recce CL-73/CL-74 and the CL-84 (which started out as a DHC Beaver-sized utility aircraft).