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thanks guys for the info pictures replies & stuff , its been greatly appreciated !!
yeah could go aftermarket 4 bolt mains block , but , thinking would be easier on bank account , it i could make use of this 71 block , i know power & cheap don't really go in the same sentance ! , these aluminum main caps ! something is bothering me !! don't laugh Guys , i know my way around engines & rebuilt a good few over the years , but will never know half as much as you guys on here , wont the aluminum main caps expand different to the cast iron block ! & change bearing clearences !! yeah said you would laugh ,







also what about aluminum caps in a motor that will spend lot of time on the street ,




...The street was what I built that AL cap'd block for, but health got in the way & I didn't get to find out. Yeah, it'd be nice to hear someone say, "been there done that, no probemo", & I bet there is. Hopefully someone chimes in.