LOOK at the pictures on the post just before yours. Help Carbon Fiber ........
It a Sig Kadet Senior and the cowl and engine were moved forward .65 inches
See the 1/4 x 1/4 balsa blocks that were glued and screwed to the firewall.
This was overdone as only one block was needed on each side. You can
probably move the engine and cowl forward about .75 inches max.
Good Luck with your Sig Senior.