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I then pulled the front head from the engine. The intake ports are full of junk and debris but the cylinders are fairly clean. The piston tops are dark but no huge deposits and I simply wiped them with a paper towel before photographing. I did the same for the cylinders, wiped them with a paper towel only. There is no discernable ridge at the top or scratches in the bores. The bores are stained and discolored but close inspection reveals the crosshatch is still visible. It would probably run just like it is but if this is to be put back in service, it will get a dingleberry hone job and new rings. No machine work. I didn't measure but the pistons are well below the top of the cylinder, probably .050" or more, so there is no squish or quench to enhance mixture motion. This is par for the course and the LN3 is the same way. In all other respects, these heads are no better or worse than the LN3. The only apparent difference, other than the rocker bolt threads is there is a hole in the wall that the intake bolts to to line up with the internal PCV system, the same as the L27 and all Series 1 engines. It is a simple matter to add this hole to an LN3 head. The chambers of the head are dirty and crusty and will take some cleanup to get a better handle on what shape they are in but I doubt any major problems. One other observation which has little to do with this story other than noticing the size when disassembled: The LN3 and the Series 1 engines are approx. 9.5" deck height, from the center of the main for the crank to the top of the cylinder. This is approximately the same as a 351 Ford engine, which is a relatively large "smallblock". It makes the engine quite wide, but it does have the upside of allowing a long piston rod with the 3.4" stroke, almost 6.5" long. The large rod/stroke ratio lessens the sideways force on the piston which theoretically lessens friction and increases lifespan. The Series 2 engines have an approx. 1" lower deck height, or about 8.5". That is the primary reason almost nothing is the same as the Series 1. Everything is shorter and lighter. It is also a good reason to look at a Series 2 swap even in n/a form. That lower deck height and the 3.4" stroke are almost exactly the same as the very successful 347cu in stroker for the five liter Ford engine. Not suggesting it is copied but it seems to be a very happy combination of dimensions.

good morning sir one day off work a little cold today outside , im going to check for the buick reatta and try to adjust the tps sensor if i can as you told me .thank for your support, yes that virus is something ,im glad to be part of helping people suffering ,i hope that virus will be over and life get back to normal ,have a good day

I just received a set from the above referenced vendor ... I am pleased with the quality of the product and quick delivery from ECRP! See photos