366 and 427 Chev's were "tall deck" engines. The cylinder block was o.400 inches taller than the 9.8" LT and car big blocks. The tall deck was 10.2 inches. The 427 tall was a good engine and made a lot of power. The 366 was very powerful, but only hit about 4000 RPM. It can just sit at that all day.
1988 F-150 4x2 4.9L M5R2 3.55NL
1989 F-150 4x4 4.9L T-18, 3.08LS, HD suspension, Front Quad shocks rolling on steelies and some Super Sport HT 31x10.5x15's. Not bad for a $200 80,000 mile truck with a clear title.