Yeah injected block and heads. Harrop carbi manifold, Cam to suit and electronic ignition. Even without a stroker kit you will make more power then a standard red 5ltr engine. You will have to change pick up and sump as well as deal with the chev bolt pattern block easy to get around Just costs more money. I have a 253 here with big valve heads, flat top 30 tho pistons four barell manifold and went real well. There is also a bloke near me with a worked 253 in a WB ute and 5 speed box built years ago that would give. 5 ltrs a hell of a run. So the option is up to you.
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