Thanks again guys. Yes I appreciate the head and pistons will need work plus to get it to 16:1 CR. We chose the W58 over the T50 because of the faster 2nd gear ratio which we run in when racing. We do not have a very good selection of axle ratios here. I do hear you on the weight though and that is ...

Thanks for the reply jondee86. Yes that is correct. I have been doing some research. This is going to be a costly exercise - thus seeking advice / comments. Evidently all 4A heads and blocks are of the same bolt pattern / interchangeable. Some have fitted 4AGE heads on 4AC blocks evidently no proble...

Howzit all. I joined the forum in the hope that I can get some help and guidance on building a race motor here. No multivalve motors allowed - only 8V SOHC 1600cc. So I know you can put a 4AGE on a 4AC so why not the other way round? I appreciate we will have to get the head gas flowed properly. It ...