strapman

thanks again for everyone help. I ended up with 150 in back and 90 in front. plugs look real good in three different rpm range. exhaust temp is 1250 most of the time but at wot for a good while it hits 1375-1400 . does any one have any throughts about this temp.

John B

Where are you reading the exhaust temp? If it's at the end of the 4 into 1 manifold, you are reading an average value. If you can stay under 1400 on all cylinders you should be fine.
JB