What years were speed density and which were MAF? What size injectors do the 2.8's use?

MFI V6 cars were MAF up to the end of the 89 model year. MAP/Speed Density was used on the 90-92 3.1 models.

2.8 engines had 2 different injectors based on the model year. Up to the end of the 87 model year, GM used Delco pintle cap style injectors with a 15.4 lb/hr rating. 88-89 2.8 and 90-92 3.1 engines got the 14084888 Bosch style injectors with a 14.7 lb/hr rating. I seem to have lost the link I had for this ATM...

14.7 or 15.4lb both are considered 15lb injectors, both can be used with the 2.8 and 3.1