They are the same block aparently but as different head. This guy has worked with mitsus for over 10 years so i would take his word over mine.

What im thinkin is maybe your mechanic is wrong. Due to the fact htat most Eclipses/Talons have the 4G63 motor in it and not the 420a. Maybe he has seen the 420a in a neon before and assumed that it was a neon motor.

 

Do motors have some type of number on them so that you can find out definitely what you have?? Between the heating problem in the winter, and a cooling problem in the summer (A/C compressor went out 2 months ago!!), I'd like to know what parts to use. Just so you'll know, I'm 36 years old, and I've never fooled with Imports. I've always had a Chevy or Dodge.

Let's just say I did want to buy a motor, and rebuild it from the ground up. What would you suggest?? I'd definitely want it to scoot.

 

I recomend a SBR shortblock

 

Ok... Remember, I am NEWBIE to this forum, as well as the Import World. You'll have to be a little more gentle. Laymens terms please.

 

Sorry man. www.slowboyracing.com has an awesome 420a engine that can handle some nice power. Defenatly if you want to turbo it that shortblock is the way to go.