I am considering doing the same IFS swap into a 1948 F1 Ford pickup.
While researching the swap online I came across these
I realize that a F1 Ford is NOT a 40 Chevy ... but you might find the info interesting.
And a Jaguar XJ6 wheel bolt pattern is the same as Chevrolet ( 5 on 4.75 ).
"I won't be wronged . I won't be insulted, and I won't be laid a hand on. "