Tombarace14 Posted September 10, 2007 Share Posted September 10, 2007 The Mex blocks were supposed to have a higher Nickle content in the block making them stronger. Quote Link to comment Share on other sites More sharing options...
rudypoochris Posted September 11, 2007 Share Posted September 11, 2007 What cars featured Mexican blocks? Were any of them late model 5.0L HO's? Quote Link to comment Share on other sites More sharing options...
doczg Posted September 11, 2007 Share Posted September 11, 2007 The mexican block was around in the 60s and 70s and they have a wierd circular boss cast into the front of them by the water pump. The mexican block has higher nickel content and thicker main webbing. The main webbing is supposed to be close to the old boss 302 blocks minus 4blot main. It u wanna make an easy 500hp get a roller block 351w, i believe they are 88 and later. Put in a 408 stroker kit and some trick flow heads and u can get your 500hp easy with killer torque. Btw all 351 bottom ends except for the pistons are good to around 700hp with just replacing the stock bolts with good ARP ones. All 351w motors have forged rods, and even though the crank might be cast remember it has 3" mains... Quote Link to comment Share on other sites More sharing options...
LMoore56 Posted September 11, 2007 Share Posted September 11, 2007 The 351w roller blocks were from 94 thru 96. It started with efi around 1988. Quote Link to comment Share on other sites More sharing options...
blueovalz Posted September 11, 2007 Share Posted September 11, 2007 I'm building the early block. Some sources report there is a slight difference in lower end webbing between the early and later 351W blocks (early ones being stronger). I'm fitting a roller cam in the early one, with AFR 205 heads, 1 3/4" headers, and the usual other stuff. In essence, I'm increasing the stroke by almost 1" over the current 289 motor (2.87 to 3.75), along with an improvement in the cam and heads. All reference point me to the low 500 range in torque and power over a preatty broad range. Quote Link to comment Share on other sites More sharing options...
Z24O Posted September 12, 2007 Share Posted September 12, 2007 couple of pics of the mexican Quote Link to comment Share on other sites More sharing options...
LMoore56 Posted September 12, 2007 Share Posted September 12, 2007 Hey Z240, could you post a picture of the front of the block, that shows the the two round spots? That would be for the people here that has never seen a Mexican 302 block. Quote Link to comment Share on other sites More sharing options...
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