'70s cars are one of my favorite old car eras, esp. full size. I have the AMT '70 Fords (Galaxie and LTD), '70 Buick, AMT and MPC '70 Impalas, and the MPC '71 and '72 Impalas, '73-76 Caprices. The drop-off in promo orders from the automakers probably accounts partially for why so few kits were made back in the day after 1970 in the full size niche.
However, the resin makers, esp. Modelhaus and Missing Link, have done many interesting subjects in this niche...I've got the Modelhaus '70 Ford wagons, '72 Ford Custom, '72 LTD, '72 Riviera, '73 Caprice wagon, '75 Impala 4dr, '76 Caddy Coupe de Ville, Motor City Resin '70 XL, ML '71 Galaxie and '78 LTD, AAR '71 Olds 88 and '71 Riviera, R&R '70 Chrysler 300, '70 Chevy wagon, and F&F '70 Impala 4dr ht.