Quote Originally Posted by Robo View Post
Mate I can only say 1 thing, read original title.
in a nut shell.
"Improve 4.2 petrol". not convert to v8.

cheers.
OK,ill bite
Whats your BUDGET ???

Lets look 12K
Brand new crate engines
Brand new 502 CUIN ($11,950)
502 HP @5200 rpm
567 ft lb torque

350 chev ($6950)
388 hp
385 ft lb torque

Ford boss 363 cu in ($12500)
500 hp

eagleautoparts.com.au

These dont however include conversion kits,but that cost can depend on what you exactly buy and how knowledgable people are and what they can or cant do

A TB42 will never get reliable power anywhere near those about for 12 K

Realistic budget