The effect of inflation is easy to calculate. It adds up over the years. Even at only 2.5% annually by 2070 parts would cost 3.11 times as much. So the $350 grill for the MGA above would cost $1,090. Assuming wages rise at the same rate, a $100,000 per year salary would be $3,110,000. The grill would probably cost much more than inflation would dictate because of increased rarity. Same for Model A parts and probably cars.
Many factors influence the price of things besides inflation.
To calculate the effect of inflation take the rate to the power of years. For instance with 2.5% over 46 years, take 1.025 to the 46 power, which equals 3.11. 5% over 46 years would equal 9.43. So you can see that the inflation rate makes quite a bit of difference over time.