Heater issue

[Jezza_hr]

Right, I've had heater core problems for many years, even before I put in my 20V. but as the car hasn't been in a daily driver until now, I've never been too hassled about getting one that's not clogged until recently.

I finally got round to changing it the other day, but I'm unable to get coolant to go to it, so as a result I'm getting no heat in the cabin.

After many times trying to burp the system with the radiator sitting higher than the back of the head, it's still not getting there. I can feel that both the pipes are lukewarm at best. I'm wondering if it's my setup that's the problem, but I can't quite tell. The water relocation kit that was put on the car doesn't have lines to go to the heater, so I've had to put in 'T' junctions to circulate through it. Could anyone clarify if this the cause of the problem, or if I just need to keep burping it?

Here's a really rubbish drawing I did of a diagram showing the setup