i have an 84 n/a and i dont no what btdt is srry i basically got the car 4 months ago and have finally had extra cash to even look at the car and started to tool on it and found out the couple problems i thought it would be a fun project car and it is turning out to be that way so if you could, explain what a btdt is and I hope the igniter with coil will work if so you can get a hold of me at 813 244 7539 call any time up till 11 30