Sounds good. Maybe even as good as the SLAT (Spam Lettuce Avocado Tomato).
cut spam slices to around 1/8" thick, qucik fry on high heat to get delciously crusty exterior. Layer with other ingredients on lightly toasted white bread with a small slathering of real mayonnaise (not miracle whip, sorry). Enjoy!
To make it even better, convert to a SEAT (Span Egg Avocado Tomato) by omitting the lettuce (arguable only in the first sandwich to make it have a cooler name) replace with one egg over easy or sunny side up... warm yolk should run out as you bite down. MMM mmm.