There hasn't been much progress until tonight. After carful consideration and a lot of discussion Mark ordered some new parts for me. The guides in the #6 heads are perfect so he ordered all new valves and seats. Tonight the work started. First we grabbed a #7 head to do a test weld on with the tig.
And dialed in mark got on the #6 heads because 8 calendars should have 8 exhaust ports.
And with that we have enough material to separate the ports. Mark dose a lot of custom work for people on jet ski engines you may even recognize him. Or his logo.
So after welding comes .... Porting! Now as you may well know a 403 with #6 heads = high compression felpro gaskets drop it a little but polished chambers puts it on pump gas.
And as for valves ... This is the W-31 build lol
Yup more to come we will be spending a lot of time making these heads nice and we will be doing a lot of work on the intake manifold as well. Iwe figure if we can get more power from time spent in the machine shop then it's worth doing because while we're there lol