Moving the crossmember makes the wheelbase longer ... which in turn makes for a better riding roadster.

I helped fellow years ago with his 29 Model A and we make a pair of " feet " brackets that went off the crossmember to sit the radiator on. He had fenders and could not move the axle forward. The feet brackets functioned well but he needed a longer hood ( I guess you are going hoodless ). He could not use a headlight bar ( you most likely were NOT using one anyway ). The headlight bar would not met the fenders braces ( Like you need fender braces on your car ) .

BUT ... the added length made the proportions of the 29 weird ... at least to me .
His headlight had to be mounted to the shell ( a some what popular modification ) but looked like poo on his car.

Most of us ENJOY seeing a car go together ... keep us posted