I got the spectra heater core just to see how it fit. The mounting flange didn't line up, and the tubes were too far apart from each other, and the smaller tube had 2 sharp 90 degree bends instead of the more gradual bends in the original. You couldn't even get the tubes through the holes in the heater box.
I took the box and the cores to Greenwood Radiator in Seattle. Ron desoldered, tweaked, bent and resoldered the tubes and the flange, and charged me a pretty low price. Fits well.
Definitely recommened this shop to anyone in pacific northwest.
I came out less than half the cost of rebuilding my original, which I will hold onto
