Did you weld up the 3 holes on the doors where the OEM side view mirrors went?
x2 on thicker oil and Toyota (or Wix) filters. I use Rotella T6 in both my 1Fz and 2F. Luckily they both take the same oil filter so getting them a case at a time makes sense. And for 8 more oil changes get the old school small Toyota filter made of unicorn tears.
BTW, what month 77 does it say on the driver's door jam data plate? Mine is a 7/1977 CA spec but doesn't have the fan under the hood. Mine has the standard air intake horn and not the elbow like yours does. Did you put the fan back in or leave it out?