318 cam change

Hello aj if what I fit don't get low fifth teens at the run what u brung then I will have to do more! There's no more £ left at the moment . And the wife wants hollidays got to keep the old girl happy. About 25 years ago I had this set up but no headers and original valv springs in a 67 four door valiant it done 15 point 2 secs , that will do for now ( I hope) plus I got big back tyres now 😃 Pistons sounds expensive but thanks for your input it's all worth knowing.