hI!

I thought the stock fuel pump doesnt have the capacity to fEED fuel to twin 40 solex Type t carbs

First i need find the problem - lack oil of on rocker arms and i will follow your advices
I read this on the forum

Distinguishing Features
Any A-series cylinder head can be bolted onto any A-series engine block. However, compression ratio, port size (oval port, and round port), and manifold stud pattern need to be taken into consideration. Naturally, it is best to match port type, and size (e.g round port manifold, and round port cylinder head).
The most critical difference, is the rocker shaft oil passage. It was relocated in 1974, as part of the A-series engine redesign.

The rocker arms are interchangeble before and after 1974???
Or i set up an incorrect A12 Cylinder Head Gasket i will buy now this one

http://www.ebay.com/itm/NEW-GENUINE-C ... :uJcAAOSwIQdZMKFU&vxp=mtr


Secondi have another thing which makes me worries The carbs that i bought originally had Mainjet 160 airjet 210 and i changed them to Mainjet 120 and airjet 190
The car start well keeps a good idle, the engine has a good reponse to the acelarator but on street looses power on some rpm ranges and sometimes goes down and makes bad explosions.

I think this malfunction can be caused by the lack oil on rocker arms that causes wear on it, and all intake/exhaust valves gains clearances from 0,50mm to 1,00mm and the engines runs bad, and looses power and dont speed correct, or can be consequence of my bad jetting?

Thanks

lUIS