Thanks, Brett.
Looks like I have... NEITHER. Mine has features from both, It seems. I guess the PRO is an older predecessor of these two engines.
The hydraulic lifters are present, but it's not fuel injected, I don't think. I guess I need to keep researching. Thanks for the links and the info!
-TH
Looks like I have... NEITHER. Mine has features from both, It seems. I guess the PRO is an older predecessor of these two engines.

The hydraulic lifters are present, but it's not fuel injected, I don't think. I guess I need to keep researching. Thanks for the links and the info!
-TH