406 coupe needs help

[406coupe]

hi guys i am new on here i have a 406 coupe 2L that has stopped working rac came out and said it sounds like a cam problem
so i may need a new engine (so i am told) my question is should i put a 406 sri turbo unit in i dont want mad hp but would love a dump valve so it could stay stock
i know its its not super quick but hey cant have everything i dont want a v6 can be arsed with all the work and funds that would be involed
i want to sort it as cheap as i can as funds are tight at the mo and it is my daily car so has to work lol lol
what should i change if i get an sri engine ie cam ect and what should i avoid i dont know much about engines and dont wanna get my fingers burnt
w
the wife says keep it as it is ie a 2L 16v coupe engine but i wanna take advantage of the momment and get that dump valve in

any help would be great thanks guys

[406coupe]

quoting what he said he says could be cheaper to change engine ??????????
i would like a turbo but would like my car on the road more