Here's the price list from '89. You will see a the 302 is fitted with a Clevo with Motec inj. and listed at $60k. The 429 came with sidepipes and Kevlar body and listed at $75K. By '91 these prices were $100k and $116k respectively.
2 pages of 91 price list
I also have a price list from 95 but it doesn't list price of turn key cars. Basic kit was still in the $14k and a roller was $29,978