[ERA Chas]

Not quite that simple-need more specifics. EG:
My iron block, ally head / waterpump /intake in ERA w / jag IRS is 48 / 52 w / half tank of gas. Measured with digital corner weighting scales. It's 47 / 53 with me in the seat.
The 'whole FE is nose heavy' is myth believed by the small block guys.