2 Litre Pinto Tuning ?

[TSM Locost]

Burton Power
SOHC Pinto Engines

All engines produced after 01/89 are suitable for use with unleaded fuel. For all other engines, an identification mark (adjacent to No 4 spark plug) must be present to designate suitability for unleaded. These are:
* 1.6 - M, MM or N, NN
* 1.8 - S, SS
* 2.0 - P, PP or R, RR



I would have thought that all injection would be converted from new, looks like i am wrong, Bugger.