Need motor mount advice please

['65 chevy lover]

Originally Posted by Kenfuzed

If moving the engine forward they use the existing holes. On the cross member there is a forward hole closer to the frame that you use. If staying in the rear position you'll need to drill a new hole in the cross member.

Below are pictures of the frame mounting points before and after I trimmed it back earlier today. You can see the old location in the first picture.

These perches were originally designed for 67+ models so you have to cut back the edge of the frame for the top holes to align. I trimmed it back ~5/8" but the best way to know is to mark where the perch holes would be when pushing the perch against the frame, then measure the distance between the center of the hole and the mark. This is how far you need to cut into the frame.

With a reciprocating saw and 14 TPI blade the frame cut like butter. I cut in at an angle to make it easy.

I'm still a little confused ( not hard with my BB brain ). My truck had a 305 in it. The distributer was very close to the firewall. I'm putting in a 383 stroker motor with TH400 trans. I'm going to have to have a new drive shaft made anyway and, move the trans cross member so, I'd like to move the motor forward some to make sure I have enough room to get to the distributer cap off if needed. It also will have a electric fan driven rad from Griffin. What I'm confused about is, you mention "If moving the engine forward they use the existing holes. On the cross member there is a forward hole closer to the frame that you use. If staying in the rear position you'll need to drill a new hole in the cross member."

It looks like you didn't use the stock holes. Appears that using the holes you did moved the motor forward and, their not the stock holes but, doesn't look like you had to drill another hole. Guess I'm missing something here.