1970 Duster starter

The instructions say you can use stock or Mini. With all TTI's I've installed I used a Mini.
the only way I can see to be able to use stock starter would be to install starter first, then the header! I have tried to put the stock starter in with header in place and there ain't no way it will slide thru there! Period! I went ahead and ordered the one from Ebay! thanks for info! Bill