Okay thank you for your infos dogdays. I already did the distributor.
I want to add headers at last (maybe before converter change). I want to change my Thermoquad for a HP Thermoquad from a 440 and adjust it.

@D_C: it's a 1974 Newport. On the internet it is said to be around 4600 lbs.
I had to weigh it to register it but I don't know where the papers are.
But it's pretty heavy...