After umming and ahhing about what to do I have taken Ratboxes advice and found myself a 149 red engine to put into my ute. It is a tow car and the grey simply cant cut it any more and the mods needed to get it up to speed to tow are just too pricey for my modest budget. I will paint it grey as side by side, they dont look that much different to my eye. I can leave the original front end in place which is in great condition so with the grey motor to one side, I can always convert it back some day if need be and grind off the mounts I will be putting in.
I have got a 149 that has never been rebuilt and have had it stripped then acid dipped and crack tested. I have gone for brand new over sized pistons that bring it up to a 157 iirc.
While I am still buying parts, is there anything I should be aiming for? I am looking for torque naturally in regards to towing. The steel timing gear goes without saying

Thanks in advance,
Damo