i need help w/duster engine

is this a street car or race car....

gonna need alot to make that big roller work...beside valve to piston clearance...

gears..converter...

its got an 8" 5k from Kenny Ford in ala.
I have a 4.30 in it now...with the 29" tire.
but i have 4.56 if i need it..?

the heads flow to .600" or lets say..they didnt drop off till after that..on
the flow sheet...my uncle ported them..they are ta/X cast iron heads..

mel.