Michael,
DO NOT just include L/78 & L/89 cars. Take a look at the
production numbers and you'll see how many L/35 ( tons )
and L/34 ( more rare ) cars there were. When I restored
my L/34 years ago, I ran into so much difficulty because
Jerry MacNeish and others focused on the SHP cars only.
I had to do so much extra work because no one was sure what
the "other" big blocks used as correct. Simple things like
the throttle rod, proper tach ( variations ), SMOG, etc..
So, my vote would be to include all big block applications.
Make it the defacto BBC only site.
Steve