SBM Offset Roller Lifters and BigMouth Heads

Per the DC racing manual, the stk. R&L offsets were "about 1/16 inch". Per SA Designs "Mopar Performance"..."the W2 intake pushrods have been moved another .250" further
away from the intake port centerline than the T/A"."The total is now more than 3/4 inch from the rocker centerline."
This would indicate the .770" for the W2, ~.520" for the T/A, which is ~.460" more offset than std. J heads.