I don't think its a matter of no one gives a hoot, headers can be found easily on line, and as for the coil it already has an electronic HEI.
My little work mate runs the same engine and it runs like a dream, the 1rze engine produces maximum torque at 2800 rpm, I wouldn't go throwing big dollars on it , rather stick a 3rz in it and go from there
1RZ-E[edit]
The 1RZ-E is the fuel-injected version of the 1RZ. With a compression ratio of 9.0:1, output is 101–108 hp (75–81 kW; 102–109 PS) at 5,400 rpm with 118–123 lb⋅ft (160–167 N⋅m) of torque at 2,800 rpm. With redline at 5,500 rpm
3RZ-FE[edit]
The 3RZ-FE is a 2.7 L (2,693 cc) version. Bore and stroke is 95 mm × 95 mm (3.74 in × 3.74 in). Compression ratio is 9.5:1. Output is 150 hp (112 kW; 152 PS) at 4800 rpm with 177 lb⋅ft (240 N⋅m) of torque at 4000 rpm. This engine features twin, chain-driven balance shafts. It has four valves per cylinder and DOHC. Valve adjustment is by shim over bucket. The 3RZ-FE is an interference engine