So, since I have been slammed at work for the past few days I have done nothing on the Blazer. I did however start my research on the 454.
Seems what I have at the moment is
Block - 361959.....454.......73-90...2 or 4 bolt
Heads - 346236.....75-87...oval...OPEN...454, 120cc chamber, 225/116cc ports Build dates Dec 78
Peanut Ports! yeah....
Ok Ok, on a happier note, I did fine a good set of 049 and some 781 heads locally, and will go look at them this weekend.
So in the meantime, I am finishing up the details to get my 78 swb back to driving condition (it's only been a year and and half)..
I am also configuring my shop space while making a lift setup to aid me when I pull the tub back off the chassis.
I hope to make some headway over the weekend.