I have the original 170/903 combo in my 64 Valiant. I have a good running 69 225/904 that needs a home...170 needs a rebuild. Should I stick with the 170 or go ahead with the 225?
NOT going to put a V8 into it, so skip that suggestion.
Just rebuild what You've got, everybody is giving You advice on "How Much Power", but the thing's original & it's not a race car. You're going to pooch a bunch of stuff for
little overall gain by switching in the later combo, driveshaft, exhaust, shifters/pedals, rad w/o to one with cooler for trans etc. etc............the 170 is a fine little engine &
can run really well w/o turning it into a racing mill with just a few upgrades during the rebuild.