1990 xj6 photo-vin 627633 Question
 

https://lh3.googleusercontent.com/Uh...I=s250-k-rw-nohttps://lh3.googleusercontent.com/mr...4=w316-h237-nowhat other years or models wI swap a front sub frame with.

Hi mgreene,

Those numbers are just the sequential chassis numbers which mean nothing in isolation when identifying what model Jaguar you have.

It is the preceding alpha numeric digits which reveal the details of your car.

(an example SAJAC13D4YK F16799)

Again, I can't see your posted pics, so as per your other related post, I believe you may in fact have an X200 S Type which has no body part compatible with either Series 3 nor XJ40 chassis

Cheers,

Nigel