340 timing

[tomt966]

Well I got my 340 dropped in my 68 dart last night and it runs so thats half the battle. Kickdown doesn't work yet. Still have a header leak just like on the 318 so it must be a warped manifold flange. But, I digress. It has a comp XE268H-10 cam and a Holley 750 dp. What is a good "target" for ignition timing? Is it set with vacuum connected or disconnected? Thanx

 

[ramcharger]

Aim for total timing of 34 to 36 BTDC without the vacuum advance vacuum line dettached. When I say total, I mean initial plus mechanical advance.

 

[redfastback]

a guy i know has the same cam in the same motor and he runs an msd dist. and has 21* of advance. that equates to 14* initial timing and 35* total.