Help me choose swingarm length, 1st gen R

[Gripit'n'ripit]

Dropping donor arms off to a fabrication shop for an extended swingarm for an 82 250R.

Looking for feed back and advice for the length of the arm, at the MOMENT i'm planning on +3 to make it roughly equal to a 2nd gen 250R.

Want to make the trike a little more trail friendly. The seat is right over the axle and I have to straddle the tank far too often.

Any one prefer longer? What was a favorable length to the old West Cost arms? STRoberts22 still fabricating? Am I shooting myself in the foot?
Thanks

[atc300r]

I have a Stroberts plus three on my 81 .Seems to be a goid all around length.

[Gripit'n'ripit]

I have a Stroberts plus three on my 81 .Seems to be a goid all around length

That is what I was hoping for. I have not been able to get a hold of him since s went down.
Any way to contact him for a quote?
That length arm decent for trail riding? Using a stock shock?

[fabiodriven]

I was in touch with Roberts earlier and told him someone was interested in a swing arm from him. He said he's not making any right now.