Are the words "Truck" and "Pass" on a 4351, 427 Block

[Charles S.]

Re: Are the words "Truck" and "Pass" on a 4351, 427 Block

I've owned my 67 BB for 27 years and have never seen the word 'truck' on it. Maybe I'm not looking in the right place?

It's there, but you would have to remove the bell housing, clutch assembly and the pressure plate. It's casted on the back of the block. Thanks. Chuck

[Richard M.]

Re: Are the words "Truck" and "Pass" on a 4351, 427 Block

Right, I just re-assembled a rebuilt 351 4-bolt 435hp and it had HI-PERF TRUCK PASS in the same area you speak of at the rear of the block.

edit.....just found a picture when I was test fitting stuff before it went in the bay. You can barely make it out, it's at about 1 o'clock at the edge of the flywheel.

edit.....I enlarged the area.

Rich

[Wayne M.]

Re: Are the words "Truck" and "Pass" on a 4351, 427 Block

One more shot, to prove that these 3 designations were even found on 2-bolt 396's (961 block), at least in May of 1965 (E-14-5).

Note the casting "PASS" on the top RH exterior surface. According to the '65 TIM&JG, this typically changed to "HI PERF" on 3855962 4-bolt Corvette blocks cast in months E and F (or to end of '65 BB production). I don't know whether the 2-bolt 961's also changed later, but doesn't really matter for purposes of NCRS.

[Charles S.]

Re: Are the words "Truck" and "Pass" on a 4351, 427 Block

One more shot, to prove that these 3 designations were even found on 2-bolt 396's (961 block), at least in May of 1965 (E-14-5).

Note the casting "PASS" on the top RH exterior surface. According to the '65 TIM&JG, this typically changed to "HI PERF" on 3855962 4-bolt Corvette blocks cast in months E and F (or to end of '65 BB production). I don't know whether the 2-bolt 961's also changed later, but doesn't really matter for purposes of NCRS.

Wayne, Wow. Thanks for the info! Chuck