[R-390] Receiver 51J-4

[Patrick]

Not an R-390 question, but with all of the knowledge here, perhaps I can get 
some help.

The 51J-4 has tunning slugs about 1 1/2 inches long, what would be the
impact on replacing broken ones or all of them with slugs that are 1 1/4
inches long? (R390 type)
I can make the length of the flexible cable  the same as the one on the 
51J-4...or should it be 1/4 inch longer???

Thanks in advance to any and all advive.

Regards,

Pat