Big block Chevy heads

<table table border="1" cellpadding="2" cellspacing="0" ><tr bgcolor="#EEEFFF">    <td>'''Casting No.'''</td>    <td>'''Part No.'''</td>    <td>'''Application'''<br>Year CID/HP RPO</td>    <td>'''Chamber'''<br> (CC)</td>    <td>'''Intake'''<br>(Inches)</td>    <td>'''Exhaust'''<br>(Inches)</td>  </tr>  <tr>    <td>336781</td>    <td>336780</td>    <td>'74 454/270 HP</td>    <td>113</td>    <td>2.06</td>    <td>1.72</td>  </tr>  <tr bgcolor="#F1F1F1">    <td>353049</td>    <td>353047</td>    <td>'73 454/275 HP</td>    <td>113</td>    <td>2.06</td>    <td>1.72</td>  </tr>  <tr>    <td>3999241</td>    <td>3999240</td>    <td>'72 454/270 HP </td>    <td>105</td>    <td>2.06</td>    <td>1.72</td>  </tr>  <tr bgcolor="#F1F1F1">    <td>3993820</td>    <td>&nbsp;</td>    <td>'71 454/365 HP</td>    <td>113</td>    <td>2.06</td>    <td>1.72</td>  </tr>  <tr>    <td>3964291</td>    <td>3964287</td>    <td>'69 427/435 HP</td>    <td>118</td>    <td>2.19</td>    <td>1.88</td>  </tr>  <tr  bgcolor="#F1F1F1">    <td>3964290</td>    <td>&nbsp;</td>    <td>'69 427/390 &amp; 400 HP; '70 454/390 HP</td>    <td>106</td>    <td>2.06</td>    <td>1.72</td>  </tr>  <tr>    <td>3946074</td>    <td>&nbsp;</td>    <td>'69 427/430 HP L88 &amp; ZL1; '71 454 LS6</td>    <td>118</td>    <td>2.19</td>    <td>1.88</td>  </tr>  <tr  bgcolor="#F1F1F1">    <td>3931063</td>    <td>&nbsp;</td>    <td>'69 427/390 &amp; 400 HP</td>    <td>100</td>    <td>2.06</td>    <td>1.72</td>  </tr>  <tr>    <td>3919842</td>    <td>&nbsp;</td>    <td>'68 427/430 &amp; 435 HP L88 &amp; L89; '69 427 L89</td>    <td>106</td>    <td>2.19</td>    <td>1.72</td>  </tr>  <tr  bgcolor="#F1F1F1">    <td>3919840</td>    <td>&nbsp;</td>    <td>Late '67-'69 427/435 HP L71</td>    <td>106</td>    <td>2.19</td>    <td>1.72</td>  </tr>  <tr>    <td>3917215</td>    <td>&nbsp;</td>    <td>'68 427/390 &amp; 400 HP </td>    <td>100</td>    <td>2.06</td>    <td>1.72</td>  </tr>  <tr  bgcolor="#F1F1F1">    <td>3909802</td>    <td>&nbsp;</td>    <td>Late '67 427/390 &amp; 400 HP</td>    <td>100</td>    <td>2.06</td>    <td>1.72</td>  </tr>  <tr>    <td>3904392</td>    <td>&nbsp;</td>    <td>'67 427/430 HP L88 &amp; L89</td>    <td>106</td>    <td>2.19</td>    <td>1.72</td>  </tr>  <tr bgcolor="#F1F1F1">    <td>3904391</td>    <td>&nbsp;</td>    <td>'67 427/435 HP L71</td>    <td>106</td>    <td>2.19</td>    <td>1.72</td>  </tr>  <tr>    <td>3094390</td>    <td>&nbsp;</td>    <td>Early '67 427/390 &amp; 400 HP</td>    <td>98</td>    <td>2.06</td>    <td>1.72</td>  </tr>  <tr  bgcolor="#F1F1F1">    <td>3873858</td>    <td>&nbsp;</td>    <td>'66 427/425 HP</td>    <td>108</td>    <td>2.19</td>    <td>1.72</td>  </tr>  <tr>    <td>3872702</td>    <td>&nbsp;</td>    <td>'66 427/390 HP</td>    <td>98</td>    <td>2.06</td>    <td>1.72</td>  </tr>  <tr  bgcolor="#F1F1F1">    <td>3856208</td>    <td>&nbsp;</td>    <td>'65 396/425 HP</td>    <td>108</td>    <td>2.19</td>    <td>1.72</td>  </tr> </table><br>

===BBC casting number resources===