I would suggest downloading the s&s protune software. Worth seeing what your ecu is doing. If I understand how the ecu works it will auto tune to a point creating an adaptive map and you can see if you are out of parameter/at the top end of the adjustment range. With a locked ECU you can’t do a map merge with the adaptive map so the adaptive map runs out of room. While you could have a check engine light I doubt that you will have a real issue.
Also do yourself a favor drive your Morgan at night to see if your header pipe glows at all. Nice to have a before and after.
Personally I prefer the look of the S&S air filter set up. This is what the factory uses in chrome for stage 1 however there are a bunch of options.
https://www.sscycle.com/products/mu...ers-chrome-or-engraved-logo-gloss-black/
