Thread: 0630 vs 0331
View Single Post
Old September 25th, 2006, 20:54
j99xj's Avatar
j99xj j99xj is offline
NAXJA Forum User
Join Date: Jul 2006
Location: Colorado Springs, CO, USA
Posts: 800
Re: 0630 vs 0331

The 0630 is a better stock head. It flows better as stated above and doesn't crack as easily as the 0331. The only issue would be fabbing up some brackets to hold your igntion rail. (I'm assuming you have distributorless ignition.)

I don't think you would have any problems passing emissions with a 0630. Just make sure your engine looks clean the day of your test. You wouldn't impress a date wearing a dirty t shirt and torn jeans, and you won't impress the emissions tech with a soiled and oily engine. So get some engine degreaser after your head swap.

Another thing, if your going to the trouble of swapping heads, take this opportunity to give the 0630 head a good port/valve job. You will gain significant high rpm power if you do this correctly.

Reply With Quote