For glow plugs i would recommend an OS8 and as far as fuel go's i would get Opti fuel 20 or 25% nitro fuel we tried techniks fuel and plugs and we never could get engines running ok switched to OS8 plugs and Optifuel they ran great 🍻
https://www.modelsport.co.uk/os-no-8-glowplug-medium/rc-car-products/1762
https://www.modelsport.co.uk/nitro-fuel/rc-car-categories/9930/993015