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I purchased Speedmaster aluminum heads 3 years ago and the rocker arms recommended for them. I will list the part numbers Heads: PCE281.2140 rocker arms PCE261.1186. The issue is the rocker arms do not fit. The outside diameter of the springs are 1.55 inches. Here is the picture of the...

I am rebuilding my 383 in my 67 sport fury plymouth, I want to increase the horse power to around 400 HP, I have the 383 commando which is about 330, what improvements should I make to get it to 400 HP?

I need to replace the transmission in my 67 sport fury plymouth with the 383. If I want a transmission other than the 727 what other transmissions can I use? If I wanted to put a GM transmission in is there one that works best?

I have been kicking around an idea to convert my 67 sport fury vert with an automatic to a manual 4 speed. The question I have is where do I find the brake and clutch pedal combination and linkage to make this work.

Hey everyone, I had gotten a differential from wildcatmopars a couple of months ago, I was doing a burnout an took the rear end out. I could not go forward but was able to go backwards back home. I changed out the rear end today, but I ran into an issue with my transmission. When I put it in...